You can't change the past, but you can ruin the present by worrying about the future.

建筑师必须是一位科学家。

The only thing that can bring you happiness is yourself.

最深刻的真理往往存在于最简单的时刻。

伟大的事情都很简单。而且大多数都可以被凝结成一个简单的单词：自由；公正；荣誉；责任；仁慈；希望。

合作在推进癌症研究中至关重要。