Jesus' parting words in the Sermon on the Mount are a warning to build our faith on a foundation of rock. Following the wisdom of the world builds a foundation of sand. Jesus tells us to build our spiritual foundation on His words... on what He taught us... on His words in the Bible. Without that we have no foundation at all. Scripture tells us that Jesus IS truth... and that He is the way, the light, and the truth... there is no other way.