Let's listen to Dan Allender (Mars Hill Review, 1994):
“To lament—that is to cry out to God with our doubts, our incriminations of him and others, to bring a complaint against him—is the context for surrender. Surrender—the turning of our heart over to him, asking for mercy, and receiving his terms for restoration— is impossible without battle. To put it simply, it is inconceivable to surrender to God unless there is a prior, declared war against him.
Christians often assume our conflict with God was finished when we converted. At that point, we were enemies of God—indeed, we were and it was a great battle. But the battle is not over with conversion. Though it is the decisive victory that assures the outcome of the war, it is hardly the last and final fight.
Sanctification is a lifetime process of surrendering as more and more intense conflicts with God and others expose and dissolve our urgent preoccupation with the self. A lament is the battle cry against God that paradoxically voices a heart of desire and ironic faith in his goodness.” Dan Allender, Mars Hill Review, 1994