When you meet with opposition, even if it should be from your husband or your children, endeavor to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.

Sustainability is not just a trend, it's a responsibility we owe to future generations.

确保和平的唯一方式是为战争做好准备。

如果你不创新，你就是在落后。

一个数学家的真正价值在于他们留下的问题。