"A Christian is one who does what the Lord Jesus tells him. Neither more nor less than that makes a Christian. It is not even understanding the Lord Jesus that makes one a Christian. It is doing what he tells us that makes us Christians, and that is the only way to understand him."- George MacDonald
Source: MacDonald, George. Knowing the Heart of God. Compiled by Michael R. Phillips. Bethany House Publishers, 1990: p. 254.