Paul Washer
The gospel is not merely an introductory message to Christianity--it is the message of Christianity, and the believer would do well to give his life in the pursuit of knowing its glory and making its glory known.

But you have burdened me with your sins; you have wearied me with your iniquities. I, I am he who blots out your transgressions for my own sake, and I will not remember your sins.
Isaiah 4:24-25