Mathematics is the key and door to the sciences.

Trust is earned through actions, not words.

The first step in liquidating a people is to erase its memory. Destroy its books, its culture, its history. Then have somebody write new books, manufacture a new culture, invent a new history. Before long the nation will begin to forget what it is and what it was.

对某事的恐惧是仇恨他人的根源，内心的仇恨最终会摧毁仇恨者。