数学中最深刻的洞见往往来自意想不到的类比。

成功的关键在于坚持和努力。

I don't let the world steal my joy.

The value of a commodity, or the quantity of any other commodity for which it will exchange, depends on the relative quantity of labor which is necessary for its production, and not on the greater or less compensation which is paid for that labor.

如果你不愿意付出努力，别人会愿意。