When you've reached a point where you're drained of all resources. When you're tired of yourself. When you don't know what else you can do in your capabilities.

That's when you realize the finite-ness of you. That you just can't do anything more. That you can't control everything.

Then you have nothing else to do but trust Him.

Faith is being sure of what we hope for and certain of what we do not see. Hebrews 11:1