我们知道的越多，就越意识到自己知道的多么少。

We must accept finite disappointment， but never lose infinite hope.

译文：一句话不对就容易把天惹塌，话没有经过多次思考就不要说出口。赏析：在说出每一句话前，我们都要深思熟虑后才能出口，否则就会中伤别人。

So given a Time Turner, I would tell my 21-year-old self that personal happiness lies in knowing that life is not a check-list of acquisition or achievement. Your qualifications, your CV, are not your life, though you will meet many people of my age and older who confuse the two. Life is difficult, and complicated, and beyond anyone’s total control, and the humility to know that will enable you to survive its vicissitudes.

我们还有很长的路要走，但我们正朝着正确的方向前进。

Freedom is a condition of mind,and the best way to secure it is to breed it.