CRISPR是一场革命，但它的方向由我们决定。
CRISPR is a revolution, but it’s up to us to guide its direction.
In the end, we will remember not the words of our enemies, but the silence of our friends.
Loneliness is the curse of nature to those who live in groups, and solitude is the only way out of loneliness.
解析：教导学生，不到他想弄明白而不得的时候，不去开导他；不到他想出来却说不出来的时候，不去启发他。