You must linger among a limited number of master-thinkers, and digest their works, if you would derive ideas which shall win firm hold in your mind.
Seneca the YoungerAlthough a man has so well purged his mind that nothing can trouble or deceive him any more, yet he reached his present innocence through sin.
Seneca the YoungerIf wisdom were offered me with the proviso that I should keep it shut up and refrain from declaring it, I should refuse. There's no delight in owning anything unshared.
Seneca the Younger