At the risk of seeming ridiculous, let me say that the true revolutionary is guided by a great feeling of love.
冒着显得荒谬的风险，让我说，真正的革命者是被伟大的爱所引导的。
Courtesy costs nothing. Lower the toilet seat after use. Let the people in the elevator exit before you enter. Return shopping carts to their designated areas. When you borrow something， return it better shape (filled up， cleaned) than when you got it.
Death may be the greatest of all human blessings.
形式化方法的美在于它们能够提供关于系统行为的绝对保证。
"The artist is the creator of beautiful things. To reveal art and conceal the artist is art's aim."