Every experiment, even the ones that fail, teaches you something valuable.

Don’t wait for the perfect moment—take the moment and make it perfect.

Liberty cannot be preserved without a general knowledge among the people.

The mind is everything. What you think you become.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

One person with a belief is a social power equal to ninety-nine who have only interests.

Patience and perseverance are the keys to scientific discovery.

永远不要低估坚持的力量。