1 Corinthians 3:10 According to the grace of God which is given unto me, as a wise masterbuilder, I have laid the foundation, and another buildeth thereon. But let every man take heed how he buildeth thereupon.
An elderly carpenter was ready to retire. His contractor was sorry to see such a good employee go, and asked him if he would build just one last house as a personal favor. The carpenter agreed but his heart was not in it. He resorted to bad workmanship and using cheap materials.