This short speech (about 3 minutes) by Martin Luther King Jr. inspires me each and every day to work for the glory of God and not for the glory of man.
In 3 minutes, I feel that MLK really sums up the basics of faith and work integration. In all honesty, I try to come back and listen to this 20+ times a year. I am looking for a place to hang the quote on the wall, but MLK's voice is so much more inspiring than the written quote. He was one of a kind with regards to motivation for the gospel.