My mind is my weapon. My brother has his sword, King Robert has his warhammer, and I have my mind... And a mind needs books as a sword needs a whetstone, if it is to keep its edge.

In all things — except love — start with the exit strategy. Prepare for the ending. Almost anything is easier to get into than out of.

科学的目标不是事物本身，而是事物之间的关系。

书籍是桥梁——连接人与人、地方与地方、时代与时代。