If you are brave to say 'good bye', life will reward you with a new 'hello'.
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.
富贵荣华如同眼前短暂绽放的花朵，何必为此自寻烦恼。
The best science fiction is not about the future; it's about the present.
肉体是悲伤的，唉，而我已读完所有的书。
"The artist must be the conscience of his time."
The greatest trick the devil ever pulled was convincing the world he didn't exist.
激励是一种艺术，是让人们去做你想让他们做的事，因为他们自己也想去做。