I want to know and understand what God is doing in every circumstance. But to surrender is to let go, to cease striving, to trust — not because I can see what God is doing and it makes sense, but just because I trust Him. Let me repeat that. Surrender is trusting God in a situation not because we can see with our eyes that He is working all things to our good. It is trusting Him simply because He is who He is.

I can follow and trust God when I can tell what He's doing. When I can see the good working out. When His character makes sense to me. But when I find myself in a situation where I'm blind, where I can't figure out the good, where everything is beyond me — then I'm in a position to surrender. At the same time, I'm in a position to deepen my relationship with God, as a child does who believes in his father, as a woman does who risks her whole heart to love a man.

in the cross, where God displayed just how deeply He loves mankind — just how far He's willing to go to prove that we can trust Him. Surrender isn't foolish. It's casting ourselves on the one who loves us more than we love ourselves.

also http://www.boundless.org/2005/articles/a0002082.cfm