We human beings are born boasters. There seems to be something in our inherited constitution which inclines us to boasting. We seem to need to glory in something, in order to inflate our ego. In consequence, we boast of our education, our possessions, our success, our reputation, even our piety. We find it hard to learn C. H. Spurgeon's dictum "Be not proud of race, face, place, or grace."
But in the last resort there is only one alternative before us. Either we glory in ourselves and in our own achievements, or we glory in Christ and in His achievement on the cross. There is no possibility of compromise. A hallmark of authentic evangelical Christianity is that we glory only in the cross.
Excerpt taken from "Evangelical Truth" Revised Edition by John Stott copyright 1999