When Hannah asked God for a child, she also promised to raise the child to give back for the Lord's service
Depression is a real thing, and has a cause. To treat, the cause must be dealt with.
When God refused to talk to Saul, Saul attempted to look for God other ways.
David knew his way would lead to destruction while God's way is perfect.
When she confronted God's Anointed One, she was determined to be the best wife to a man who wasn't right.
David, when he was reviled, reviled not again; but committed himself to Him that judgeth righteously.
In the midst of David's troubles, he was able to praise and seek the Lord.