1. The essence of wisdom is to know when to be doing, and when it's useless even to try
The Last Enchantment
2. At breakfast!' said Louise in an awed voice. 'A man who can read poetry at breakfast would be capable of anything.
Madam, Will You Talk?
3. The gods do not visit you to remind you what you know already.
4. Used every man according to his capacity.
The Crystal Cave
