The only way to have a good day is to start it with a positive attitude.

当它消逝时，你才会明白爱情曾是一份多么珍贵的礼物。你将会如此痛苦。所以，回去吧，为了挽留它而去奋斗。

True progress comes from balancing economic growth with ecological responsibility.

每一个伟大的数学理论最初都是异端邪说，最终却成了教条。