The most dangerous phrase in business is "We've always done it this way."
To be a writer is to sit down at one's desk in the chill portion of every day, and to write; not waiting for the little jet of the blue flame of genius to start from the breastbone.
 “每逢你想要批评任何人的时候”,他对我说,“你就记住,这个世界上所有的人,并不是个个都有过你拥有的那些优越条件。”
To be a good mathematician, you need to have both intuition and rigor.