A.W. Tozer
This generation has forgotten that the gospel message does not clean up and shine the outside of a person, rather it bores into the very heart and soul of a person and radically changes that person from the inside forever.

We must stand firm in the truth, in the message, for without it we have no power. We may be very nice and kind to one another, but that will not convince the world of sin, and bring them to Jesus. The truth alone can do that.
Martyn Lloyd-Jones