There is no true 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 so much superficial evangelism . . .
Evangelism must start with the holiness of God, the sinfulness of man and the eternal consequences of evil and wrong-doing.
It is only the man who has been brought to see his guilt in this way who flies to Christ for deliverance and redemption.
(Quoted in The Old Evangelicalism, Banner of Truth, 2005, reposted from HERE.)