I would like to offer an idea here today for your consideration. Please understand that this is simply an imperfect attempt to communicate an idea I've had, and that the idea you form from reading this text will necessarily differ from my idea by some unknown degree.
I've been all of the way to the bottom of the pit and climbed back out again. There is no such thing as "non-existence" within the realm of conscious experience. You will learn every lie you've ever told yourself about who you are and the world you experience, and you will fall as far as you need to fall until you find yourself once again on your true path. Your victory is guaranteed if for no other reason than that there is quite literally no other option open to you, so stop doubting yourself and start seeking that path once more. Every breath you take is another opportunity to make today the day that you finally put one foot in front of the other once again.