A good world needs knowledge， kindliness， and courage； it does not need a regretful hankering after the past or a fettering of the free intelligence by the words uttered long ago by ignorant men.
The only way to know if something is art is to see if it changes the way you think.
系外行星的多样性令人惊叹，从气态巨行星到岩石世界，其中一些可能孕育着生命。
"The mind is not a structure but a process."