Conflict is the gadfly of thought. It stirs us to observation and memory. It instigates to invention. It shocks us out of sheeplike passivity, and sets us at noting and contriving.

Mathematics is not a spectator sport.

好的企业和坏的企业的区别在于，好的企业不断地产生简单的决策，而坏的企业不断地产生痛苦的决策。