Related:

• He knows not how to know who knows not also how to unknow. -- Sir Richard Burto
• One must be poor to know the luxury of giving. -- George Elio
• Wealth is not his that has it, but his that enjoys it. -- Poor Richard
• Learn of the skillful: he that teaches himself hath a fool for a master. -- Poor Richard
• Bart: He's planning something evil, I know it. It must have something to do with the town's water supply.
  Milhouse: Maybe he's gonna pee in the river! Ba...
• He who knows not and knows that he knows not is ignorant.
  Teach him. He who knows not and knows not that he knows not is a fool....
• He who knows how to be poor knows everything. -- Jules Michelet (1798-1847)