Wisdom and doubt
Here’s a Bertrand Russell quote for you today:
The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.
It’s kind of an analog to the “The more I know the more I realize how much I have to learn” saying. If you’re completely sure of your position or knowledge about something, you’re likely to be completely wrong and end up looking like a fool. The universe seems to revel in irony, and will eventually teach you a harsh lesson.