suck in the hate suck in the pain suck everything that you crave suck up your superficial underlying fear suck up that feeling suck up that reason suck it up entirely till it gives you some reason for living..
I could be wrong, but I think it was trying to say that when you reach something that you just can't repress anymore, then that's your reason for living? That something that you just can't "suck in"? But nevertheless, it makes me think what you really meant. Nice.
"Sometimes stars can only be seen in darkness."
"Sorrow's crown of sorrow is remembering happier things."