For those who don't know and/or don't realise, people here are saying "your depression". It is not yours. Do not own it. It is not your depression, as if it is a fundamental part of you. Owning depression is dangerous - owning negative, crappy energy is foolish. Do not own negativity, illness, etc.
This also is important for affirmations - "My depression..." is owning it and is negative. Say "the depression", or depending on your affirmation, for example you could say "depression is clearing out of me" or "energies which cause all forms of depression are blocked/banished/away...from me" or "are incapable of affecting me" or "it is impossible for all depression energies to harm me", etc. - and of course add "positive[ly], permanent[ly], eternal[ly]", etc., as well, whichever are relevant to your affirmation and situation, and also with these positive affirmations, speak them in the present tense.
Using negations, i.e. "Depression is not harming me" probably would not work. OK, so it's not harming you - but what is it doing? Is it harming you terribly, as opposed to just not harming you? You must be specific - specify what you mean and what you want the energies to do. Be direct and to the point; do not waffle and do not complicate it. This might take some practice to get the best affirmation which works for us individually.
Along the line of speaking positively and in the present tense, perhaps in a separate working you should do the opposite positively and in the present tense. For example, "Positive, powerful, cleansing energies from the Sun are..." helping you in whichever way or ways. "Keeping me strong/healthy..." Doing your Aura of Protection and Aura/Chakra Cleaning and Soul Cleaning should be done every single day, regardless, and it also helps with this automatically anyway, but you might also want to add this as extra help.
I realise it is not easy to just "pull up your socks and smile a big smile", so we have to get there carefully and depending on each individual not rush it. Of course, we want to be out of depression now but change takes time. With positive, present-tense affirmations, you can also add "I am clean/healthy... now", which will programme the energies to make it be now - but remember that things do take time, and the Physical plane is so ssllooww, always lagging behind the Astral planes, so what we put up into the Astral realm takes some time to manifest for us. Saying "now" causes it to work differently than saying "soon" or "next week" or "eventually" - when is "eventually"? Our Minds and energy don't understand "will", as in "I will do this..."; so we should specify "is/are doing X now" - but it just takes some time for it to manifest down onto this Physical plane.