To know and not do, is to not yet know.
The general of a large army may be defeated, but you cannot defeat the determined mind of a peasant.
To learn and from time to time to apply what one has learned - isn't that a pleasure?
Which demands a lot of himself and some others, will be free from hatred.
When you know a thing, to hold that you know it, and when you do not know a thing, to allow that you do not know it - this is knowledge.
Baseball is wrong, man with four balls cannot walk