真理，通过理性思考和观察自然得出。
Truth is arrived at through rational reflection and observation of the natural world.
The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function.
He who refuses to do arithmetic is doomed to talk nonsense.
The best fertilizer for any business is a culture of continuous learning.
We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.
我们今天种下的每一棵树都是对明天的承诺。
数学的进步是通过概括实现的。