"He must increase, but I must decrease"
God answers prayers, even when it's not our timing and when it seems like He is silent. i'm pretty sure there's a superchick song about God's silence, but the title escapes me at the moment...
That it's okay to pray mad. We don't just have to come to God asking him for things or thanking him for things. How many times does David approach God in the Psalms saying "What the hell?!"