From the “Instructions of Ptah-hotep”:
Be not arrogant because of your knowledge, and have no confidence because you are learned. Take counsel with the ignorant as well as the wise, for the limits of knowledge cannot be reached, and no one really knows the end. Good words are more precious that malachite, and yet they can be found with slave-girls at the millstones.
I wonder what Ptah-hotep would think of this.