Ptahhotep Quote

Do not be arrogant because of your knowledge, but confer with the ignorant man as with the learned. For knowledge has no limits, and none has yet achieved perfection in it. Good speech is more hidden than malachite, yet it is found in the possession of women slaves at the millstones.

Maxim no.1. - The Maxims of Ptahhotep (c. 2350 BC)