Experiments on plant hybridization require the most careful attention and great patience.

害怕死亡是无知的表现。

To feel much for others and little for ourselves； to restrain our selfishness and exercise our benevolent affections， constitute the perfection of human nature.

成功不是幸福的关键。幸福才是成功的关键。如果你热爱你所做的事情，你就会成功。

The function of freedom is to free someone else.

"The best leaders are those who can listen as well as they can speak."

如果因为这些而损害夺取人民的衣食之资,仁义的人是不会去做的。

饥饿和贫困是世界上许多动荡和苦难的根本原因。