Collaboration in mathematics is essential; the exchange of ideas leads to breakthroughs that no single mind could achieve alone.
The writer must be a traitor to his class, his country, his religion—to everything except his conscience.
恐惧是迷信的主要根源,也是残酷的主要根源之一。战胜恐惧是智慧的开端。
The best way to predict the future is to invent it.