II Samuel 12:20-23

"So David arose from the ground, washed and anointed himself, and changed his clothes; and he went into the house of the Lord and worshiped. Then he went to his own house; and when he requested, they set food before him, and he ate."

"Then his servants said to him, 'What is this that you have done? You fasted and wept for the child while he was alive, but when the child died, you arose and ate food.'"

"And he said, 'While the child was alive, I fasted and wept; for I said, "Who can tell whether the Lord will be gracious to me, that the child may live"?'"

"'But not he is dead; why should I fast? Can I bring him back again? I shall go to him, but he shall not return to me.'"

(David is exercising wisdom here. His child died after he disobeyed the Lord, so he pleaded with God to keep him alive, but when the Lord did not, he went and worshiped Him. He also did not fall into a state of depression. David truly was a wise man.)