Lloyd-Jones on Sin and Evangelism

I realize I have not given a good D. Martyn Lloyd-Jones quote in a while, so here is one on the importance of the doctrine of sin from his commentary on Matthew 5:27-30:

There is no evangelism without the doctrine of sin, and without an understanding of what sin is. I do not want to be unfair, but I say that a gospel which merely says, 'Come to Jesus', and offers Him as a Friend, and offers a marvelous new life, without convicting of sin, is not New Testament evangelism. The essence of evangelism is to start by preaching the law; and it is because the law has not been preached that we have had so much superficial evangelism. Go through the ministry of our Lord Himself and you cannot but get the impression that at times, far from pressing people to follow Him and to decide for Him, He put great obstacles in their way. He said in effect, 'Do you realize what you are doing? Have you counted the cost? Do you realize where it may lead you? Do you know that it means denying yourself, taking up your cross daily and following me?' True evangelism, I say, because of this doctrine of sin, must always start by preaching the law.