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.

Humility, not pride, should be what motivates us to share the gospel with unbelievers. For in sharing the gospel with those who are perishing, we are reminded that we were once perishing ourselves.
Darrell Harrison