I know what it's like to be sad nigga and I gotta tell you life is never gonna present you with some definite reason to keep going, you gotta choose that for yourself, it's where all the effort in living really comes from, just discipline yourself to keep working towards a better tomorrow.
Life's all about perspective, yeah you can aknowledge what layer of prison within prison with prisons you're in, which I think is a healthy part of the process, but then you have to give up control of those grander things you can't change, and do what you can.
Let go, or be dragged.