It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.

You have to believe in yourself when no one else does.

自由的代价比镇压的代价要低。

The rule of the wild is survival of the fittest.

The history of mathematics is a history of human curiosity and ingenuity.

科学家只强加两件事，即真理和真诚，强加于自己和其他科学家。