The most important thing is to keep your mind active.
黄金时代在我们面前而不在我们背后。
南开校训，意为培养公正与能力兼备的人才，追求不断创新。
Every man has a right to his opinion, but no man has a right to be wrong in his facts.
Every moment is a chance to create something beautiful.
God eternally geometrizes.
幸福生活的关键不在于避免问题，而在于学会如何有效地处理它们。