Don't cry because it is over, smile because it happened
不要因为结束而哭泣,微笑吧,为你的曾经拥有。
True leadership means making tough decisions with clarity and compassion.
Life is too short to be anything but happy.
The world is a book, and those who do not travel read only one page.
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.