The gospel of Jesus Christ is the power of God for salvation. It is not just the core, or part of what is needed, but the whole. For it to have great effect upon men, it only needs to be proclaimed. It does not require a revision to make it relevant, an adaptation to make it understood, or a defense to validate it. If we stand up and proclaim it, it will do the work itself.
Paul Washer, The Gospel’s Power and Message, (RHB 2012), pg 58