Small failures happen sometimes. We are still growing, and we are not perfect yet. We are not the strongest yet. Important thing is that you don't give up and you keep trying.
To ultimately fail or not to fail is your choice, always. If you just stand up again, learn your lessons and keep fighting you will be good. Life and warfare are full of difficult moments. Overcoming these difficult moments, the pain, is what makes one stronger. There is no way around this.
Spiritual Satanism is all about progress and advancement. Not every day is the same, some days you will only walk a few steps, another you will walk a whole mile. But you still walk.