As I reread (well, via Audible) Mere Christianity, I am overwhelmed by quotable material. I’d quote the whole thing but then that’d just be the book. I must take this brief moment now to strongly suggest you read (or reread) this book immediately.
Below is a quote I thought particularly good and is something good for EVERY Catholic to keep in mind…especially ones who feel complacent (or even prideful) in their faith.
“The sins of the flesh are bad, but they are the least bad of all sins. All the worst pleasures are purely spiritual: the pleasure of putting other people in the wrong, of bossing and patronising and spoiling sport, and back-biting, the pleasures of power, of hatred. For there are two things inside me, competing with the human self which I must try to become. They are the Animal self, and the Diabolical self. The Diabolical self is the worse of the two. That is why a cold, self-righteous prig who goes regularly to church may be far nearer to hell than a prostitute. But, of course, it is better to be neither.”