The essential vice, the utmost evil, is Pride. Unchastity, greed, drunkenness and all that, are mere flea-bites in comparison: it was through Pride that the devil became the devil. Pride leads to every other vice: it is the complete anti-God state of mind.
If any one would like to acquire humility, I can, I think, tell him the first step. The first step is to realize that one is proud …. If you think you’re not conceited, it means you are very conceited indeed.