The Milky Way’s black hole is our closest laboratory for studying extreme gravity.

Every age has its massive moral blind spots. We might not see them, but our children will.

酸和碱不是绝对的，而是相对的。

选自汉·桓宽《盐铁论·散不足》。这句话以积土成山、列树成林为喻，说明积少成多、打好基础的重要性。

我不是为孩子写作，我是为人写作。

即使没有其他人相信你，也要相信自己，因为那是最重要的时刻。

The mind once enlightened cannot again become dark.

Tradition is important, but evolution is necessary.