"There is one vice of which no man in the world is free. ... The vice I am talking about is Pride or Self-conceit. .... Pride leads to every other vice. ... A proud man is always looking down on things and people: and, of course, as long as you are looking down, you cannot see something that is above you. ... Pride is a spiritual cancer: it eats up the very possibility of love, or contentment, or even common sense."
C.S. Lewis-Mere Christianity