The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

The greatest threat to our planet is the belief that someone else will save it.

当你开始考虑如果你输了你会做什么的那一刻，你就已经输了。

教授数学是为了激励下一代的思考者和问题解决者。

Old minds are like old horses; you must exercise them if you wish to keep them in working order.

Sustainable fishing isn't an option—it's the only path forward if we want our industry to survive.

The barriers to women’s advancement are often invisible until you look for them.