I love you not because of who you are， but because of who I am when I am with you。

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.

In mathematics, the most profound ideas often arise from the simplest observations.

科学的美妙之处在于它让我们能够探索未知，并做出可以改变世界的发现。