Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.
恐惧是迷信的主要根源，也是残酷的主要根源之一。战胜恐惧是智慧的开端。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
科学教会我们谦卑，因为每一次发现都揭示了我们无知之广。