白天鹅不每天沐浴，也是洁白的；黑乌鸦不每天暴晒，也是黑的。

A book is a dream that you hold in your hand.

The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.

释义：他认为气是宇宙的基础，因此气的无限性也代表着宇宙的无限性。

I'm not afraid to speak my mind.