In Psalm 73 we see someone wrestling with bitterness. Asaph is a religious guy, but he isn't very far in life. All around he sees people that are not good people, but they are succeeding. These people have good careers, they are wealthy, and they are surrounded by friends and family. Asaph feels bitter; he feels that he has wasted his time on God and that God should have helped him more.
The problem with bitterness is that you are thinking wrong. When we pray God shows us many things, including pockets of selfishness and pride. Into this wrestle, something happens that makes Asaph see that he's been thinking wrong. As we follow God through this narrative we come to a place of wonder.
