书是作者与读者之间的对话。
"A book is a conversation between the author and the reader."
Memory is not fixed; it’s a skill you can train.
科学的进步不是一条直线，而是一个螺旋，总是在前进，又总是回到起点。
When you say 'yes' to others, make sure you are not saying 'no' to yourself.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
