学习数学的最好方法就是做数学。
在观察的领域里，机遇只青睐有准备的头脑。
He who has no homeland is like a nightingale without a green forest.
I am extraordinarily patient, provided I get my own way in the end.
The world is indeed full of peril, and in it there are many dark places; but still there is much that is fair, and though in all lands love is now mingled with grief, it grows perhaps the greater.