国家有贤德之士而不任用,不是贤德之士的过失,而应该是拥有这个国家的君主的羞耻。
心灵的工作永远不会完成,因为适应永远不会结束。
A theory should not attempt to explain all the facts, because some of the facts are wrong.
Every failure is a step closer to the answer.