The most important thing in communication is hearing what isn't said.

Sometimes it seems as if there are more solutions than problems. On closer scrutiny, it turns out that many of today's problems are a result of yesterday's solutions.

"The truth has never been of any real value to any human being - it is a symbol for mathematicians and philosophers to pursue. In human relations kindness and lies are worth a thousand truths."

Certainty of evidence does not lead to certainty of belief.

那时我太老了，现在反而年轻了。