There are so many people today who say that they do not see the need of the incarnation; that they do not understand all this talk about the Son of God having come down to earth; that they do not understand this talk about the miracles and the supernatural; that they cannot follow this idea of the atonement and terms such as justification and sanctification and the rebirth. They say that they do not understand why all this seems to be necessary. They would argue like this: ‘Isn’t it the church that has evolved all these theoretical, purely abstract ideas? Aren’t they things which have been conjured up in the minds of theologians? What have they to do with us, and where is their practical relevance?’ I would like to point out that people who talk like this do so because they have not realized the truth about sin. They have not realized the full meaning of the biblical teaching about sin. They have not realized that they themselves are sinful.
Dr. Martyn Lloyd-Jones, Out of the Depths (Kindle Edition, location 182-188)