Then went king David in, and sat before the LORD, and he said, Who [am] I, O Lord GOD? and what [is] my house, that thou hast brought me hitherto?
When we seek the Lord and He answers us, we shouldn't take that for granted. Instead of just seeking the Lord long and hard for what we want, we should return and praise and thank Him for His response.
Interesting Note: I may be wrong, but this is the only place in the Bible where I noticed that it talks about somebody praying to the Lord, sitting down.