C. S. Lewis similarly emphasized the importance of truth to a proper understanding of humility. As the protagonist in his Screwtape Letters enthuses, “Thousands of humans have been brought to think that humility means pretty women trying to believe they are and clever men trying to believe they are fools.” This extreme is what Aristotle branded “undue humility” and as far from “proper pride” as the opposite extreme of “empty vanity.”
It's hard to be arrogant when you know you're just one specimen of eight billion of your species.
It's hard to be arrogant when you know there's more stuff to know than can be contained in the entire species.
It's hard to be arrogant when you don't know all the answers.
It only becomes hard when you encounter less informed people that claim to know all the answers only proving themselves to know way less than any person that graduated from any U.S. public high school, if they retain any knowledge at all.
Christianity claims to have all the answers, which is the best proof that they have none at all.
BTW screw the Screwtape letters and the moron that wrote them.
Christians have NOTHING to say about humility considering their hubris.