Mathematics is the art of giving the same name to different things.
Safety isn't a department - it's a culture that starts at the very top.
True understanding comes from seeing connections between seemingly unrelated ideas.
Man is not the creature of circumstances； circumstances are the creatures of men.
I think that's one of the most important things in life: to feel good about yourself.
The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they believe it will bring them strategic advantage.
The only way to tell the truth is to speak with kindness. Only the words of a loving man can be heard.