"Let another man praise thee, and not thine own mouth; a stranger, and not thine own lips." Proverbs 27:2
Too often we here people patting themselves on the back for what they've "done for the Lord"! "Well, I spent ALL day over at the church pulling weeds, or cleaning the sanctuary, or painting the walls, etc." or "I gave $XXX to that Missionary when he was in last week" or "My family donated [this or that] to the church." Wow, do you ever want to stop and say - "You're awful proud of yourself there aren't you?"
Matthew 6:3 says "But when thou doest alms, let not thy left hand know what thy right hand doeth:"
God has told us that we aren't to do things for Him and brag about it. Maybe we should all remember to spend more time praising HIM and not ourselves!