Again a long post, bear with me if you don't mind.
Well the dude pointing a gun to your head is more dangerous in that moment of course, but if you are not aware of the spiritual then it is indeed possible to become the victem of curses that could potentially end your life at the hand of a dude you have never seen, sitting on the other side of the planet.
That is speaking about us here on earth.
Magic works very subtle, same as curses and so forth. Basically energy is directed by will and attempts to find the easiest route, the one with least resistence to accomplish the desire of the mage.
Whether it is succesful depends on a lot of factors, including the spiritual power of the mage, the desire this mage wants fullfilled and any spiritual resistence the mage might encounter as the primary factors.
Telekinesis for example is a difficult ability to use, even just lifting a penny in your hands requires a lot of psychic power, let alone being able to use it in ways that could enhance your life.
Performing a feat like that succesfully requires first the raw spiritual power that is build after many years of consistent power meditation, then it requires the knowledge on how to perform this specific feat (telekinesis in this case), it requires one to know how to direct their aura etc.
Mantra's can be used to improve the effectiveness of your magic, they amplify your spiritual power and allow you to raise more energy than you might be able to do with just your mind alone. They assist in directing your will basically.
Telekinesis is more of a practical application that when succesful has direct visable and tangible results, but the process is still very abstract (read the JoS page on telekinesis if you want to know the specifics).
Something like death magic is a lot more abstract, as basically the energy will follow the path of least resistence to accomplish it's goals. If the target has equal or greater spiritual power as yourself the it is highly likely to be completely impossible to succesfully kill them with a death spell (which is a curse).
The death can occur in the form of illness, a fatal heart attack, a sudden accident or even at the hand of someone else, such as the curse causing the person to run into a vicious criminal that ends up shooting them in the head. If the person is depressed it might guide the person to suicide (depressed and otherwise mentally and physically weak people are exceptionally susceptable to curses, since they are already affected by negative energy).
When one is weak a long ritual might be needed, where you vibrate mantra's everyday for 40 days, or even longer to get the desired result, but when one is exceptionally strong or when multiple people combine their energies together to accomplish the same purpose or goal the target can suffer death after a single day, or even after someone simply wishes them to die with all their intent.
This works in all forms of magic, such as spiritual healing (which can be done from any distance, same as a death spell) and magic to attain certain things such as wealt, or love, or fame or whatever.
Simple things, such as wanting to eat a specific ice cream that you really like but haven't been able to get for a while are exceptionally easy to obtain.
Or for example if one is waiting in line at the supermarket and you want the line to hurry up, if you have some psychic power it's highly likely your wish, or intent will manifest and a second line will open up as the result of you wishing this.
But if you want to for example become president, that's a whole different matter. Because you'll be facing significant opposition of course and you'll need incredible psychic power to make this happen by yourself, which is why such things are usually an accomplishment brought forth with many like minded people working together.
Everyone, even completely non spiritual people have thought power, which is essentially the part of their being that allows their desires to manifest. With greater spiritual power you have more thought power and can as a result affect reality to a greater extend and make it bend to your will to a greater extend.
The greys function along those lines too.
However this is also where things become a bit complicated, as for example if you are very afraid of something happening to you, or very obsessed about something and want it badly with all your might you can draw these things towards you even if you didn't intent for this specifically, and this can come in many, many forms.
With more power you can manifest those things much faster, which can work to your detriment significantly.
This can also cause self hallucinations, as energy takes the path of least resistence to manifest your desires.
For example if one is obsessed consciously or subconsciously about UFO's you can actually cause yourself to manifest a hallucination which appears entirely real to you where you see that UFO you were to obsessed with, but unbeknowst to you it's actually a delusion in your own mind caused by yourself, by means of programming your own mind to attract something that's completely impossible.
Excessive paranoia can cause such things as well, such as being paranoid about ET's and UFO's, you can program your mind to percieve them everywhere and drive yourself insane because you keep focussing your mind on it in one way or another.
When you subconsciously direct your will it still directs your will.
The primary way to prevent such delusions, hallucinations and other kinds of self programmed misperceptions, paranoia and misfortunes is by performing void meditation.
Void meditation allows you to completely regain control of your mind and emotions, when sufficiently mastered you can at all times fully control your emotional state and banish any sort of derimental thoughts, as well you become aware of your subconscious and can keep it under control to prevent yourself from accidentally attracting something you should not, or desireing something you should not.
With that said, I will firmly suggest the OP to work on a lot of daily void meditation in order to dispell any delusions he/she is currently suffering from, whether known or unknown to him, whether conscious or subconscious. You are clearly not in control of your mental state and are prone to paranoia and delusion which works to your detriment, significantly.
The goal of spiritual satanism is to gain full control of your being and thus ensure your own freedom in all ways, which can be accomplished by performing power meditations and as a result building your spiritual power, which you can use to better your life and mind in all ways, keep yourself safe from malicious physical and spiritual forces and can allow you to fullfill your desires.
Another simple example of how this can work and how different levels of spiritual power can allow you to do certain things on different levels:
When someone get's sick they often want to get better, however someone with little to no spiritual power might take a long time to heal from something as simple as the flue.
Basically the flue can be seen as a physical manifestation of negative energy that latches unto you and attempts to infect you. People who are ill have a greyish or otherwise dirty looking aura around the afflicted area.
Someone with little spiritual power can wish to get better but their power is too little to really do much, they notice they are getting sick and thus they mentally prepare themselves for a couple days of illness and as a result they suffer from illness. They often resign to the fact they are ill and cannot put up a very strong resistence mentally.
More severe illness is basically equivelent of more severe and dense negative energy and thus requires greater will and spiritual power to remove.
Now if said person with little power has family and friends that wishes them to get better soon they will actually heal faster, because those outsiders are directing their thougth power (which is the physical manifestation of spiritual power) to wish him to get better soon.
If said person is alone and instead he has some people that dislike him and wish for his or her suffering, or perhaps even wish for them to get more ill than they already are then they can actually get more sick or stay sick longer. Even people with little to no power can affect these things with their thoughts.
Now if said person feeling that they are getting sick is a spiritually powerful individual they can easily dispell this before it ever takes root, by willing it to go away and invoking golden light to clean their aura and ward of negative energy.
Likely a spiritually powerful person never get's sick due to their aura's deflecting these negative energies away from them and if they do they have many ways to deal with it.
In some cases they do get sick but this might be from outside sources, such as curses directed to them, or past life karmic influences that are lingering on their soul, which might actually manifested stronger and worse as one gains more power due to the fact that things on the soul from past lives can cause the subconscious to attract these or desire for these, be it negative or positive.
Then you have more powerful beings like our Gods. For them illness doesn't even exist, they have long banished such meager influences from themselves. Curses directed to them simply backfire and instead hit the person who send them with double power and so forth.
Now back to the case of the weak individual getting ill. If they have a spiritually powerful friend and that friend knows they are getting sick, that friend might wish for them to get better quickly or not get sick at all, which can manifest and result in them not getting sick at all.
In other cases simply the pressence of a spiritually powerful person in the room or household can prevent illness in people around them due to the fact their aura radiates powerful positive energy, or they can cause everyone in the house to become ill while remaining unaffected themselves if they send out an aura of hatred towards the others living with them.
Thought are basically Magic. As Magic is the will of the mage directing energy and programming energy to accomplish their desires. Thoughts are equivalent to desires and thus thinking something is basically performing magic.
Directing a thought is the simplest form of magic, which the experienced mage or spiritual satanist or otherwise mystic, etc, can amplify with mantra's, vizualizations and astrological timings.
But at a certain point it comes around full circle where the thought, and the direction of ones will is all that is needed to accomplish their desires. Thus the mind itself becomes the full manifestation of the beings power.
For us directing a thougth might do it for simple desires, but bigger things require more effort, but for our Gods it is simply a matter of directing their will to make things fall into place however they disire, with the only limit being their spiritual power itself.
As such, taking the life of a human is childs play for them, but taking the life of a being with equivalent power requires a lot more effort, simmilar as for us killing a bug is as simple as stepping on it, while killing another man physically requires a whole lot more effort..
Same with healing. When one is strong enough they can heal otherwise fatal injuries with their mind, regrow lost limbs and organs and surpass death itself, or easily perform feats that would require a whole team of surgeons hours and hours of work with a large risk of failure by directing their energy into a patient and willing them to heal, even from across the galaxy.
As a testimony to this, I saw a god personally heal my Grandmother who was on her death bed and beyond saving. Suffering from a fatal blood cloth in her brain and being comatose with a heartbeat of under 20 for an entire night (which results in the brain lacking oxygen and should have left her as a vegetable even if she miraculously survived by herself).
As I was attempting desperately to heal her, draining myself to such an extend I nearly fell unconscious in order to save her life, vibrating healing mantra's for 8 hours straight to no avail, as I was laying on the ground lacking the strength to even get on my knees, lacking the strength to even think as a result of me draining every ounce of energy I had within my being and sending it to my Grandmother.
This God came to me and placed his hand on my back, he shared some of his energy with me, which immediately reinvigorated my being, gave me the strength to stand and refilled my soul which I had pretty much emptied entirely, my body filled with a warmth that felt as if standing next to an open fire, my mind regained focus from the shock of energy which felt like a literal lightning bolt (without any pain however).
I directed this energy he gave me to my grandmother for the rest of the night. At that moment I heard from my family my grandmothers condition stabalized, after she had been struggling with death the entirety of the night.
I was unable to safe her with my own energy but I prevented her from passing away, allowed her to cling to life and didn't allow her to die for these 8 hours prior to that God comming to help, after I was drained myself and unable to sustain her life any further. Then that God came and reinvigorated myself and with this burst of energy my grandmother immediately stabalized when I directed this energy to her (with the help of this God).
The next day it appeared as if she had suffered very bad brain damage, she couldn't speak and she couldn't even more her arms, so weak she was.. Some of her organs had shut down from the lack of oxygen which basically meant she was still going to die and could not be saved.
When I was visiting her that day this God came again and placed his hand on her (astrally of course, nobody could see it except for myself). His hand glew bright white gold for a moment and let go of her again.
After which he told me that my grandmother will be fine soon and that I have nothing to worry about. That she will stay alive for multiple more years at least and have minimal suffering untill her life would run out so she can live out her last years in relative peace.
In the hours that followed she made a recovery that doctors could not explain and the day after she was completely fine, ready to go home as if nothing had happened. Her brain and other organs suffered no damage at all dispite having been given no treatment at all aside from my own and that God's healing energies.
She is still alive and well. Even though she's multiple years older now it appears as if she's not aging for the moment and in some ways it might even be concluded she's more vital than she was before her encounter with death.