The most important thing in communication is hearing what isn't said.
希望存在于任何黑暗中。
Time is your friend; impulse is your enemy.
数学不是一项观赏性运动。
泽畔野鸡，宁愿走十步远去啄食，走百步远去饮水，也不希望被关在囚笼里。
The historian must be impartial, but not indifferent.