如果你在尝试改变世界,那么你正在做真正重要的事情。相信你每天都会在兴奋中起床。
矿工最伟大的工具不是他们的设备,而是他们的判断力。
"Courage doesn't always roar. Sometimes courage is the quiet voice at the end of the day saying 'I will try again tomorrow.'"
幸福不是现成的东西,它来自于你自己的行动。
Mathematics is the language with which God has written the universe.