A pure hand needs no glove to cover it.

图书馆的存在本身就提供了最好的证据，证明我们对人类的未来仍可抱有希望。

数学的目标是理解我们观察到的现象背后的结构。

Love is the ability and willingness to allow those that you care for to be what they choose for themselves without any insistence that they satisfy you.

所有财富都是劳动的产物。