Colossians 4:3-4
At the same time, pray also for us, that God may open to us a door for the word, to declare the mystery of Christ, on account of which I am in prison— that I may make it clear, which is how I ought to speak.

We should never tell a man that he only needs to add Christ to make his life complete. He must be told that without Christ he has no life.
Paul Washer