What is a purposeful life? It is found in understanding that you are called to live as the salt of the world and light of the world. This article explains what that means, from Matthew 5:13-16.

John in His gospel records the seven I am statements of Christ. These statements tell us something about the identity of Jesus. This article looks at the second one – I am the light of the world, based on John 8:12. 

From John 8:12, this article shows that when Jesus said, "I am the light of the world," he was pointing to his work of conversion.