The discovery of the accelerating expansion of the universe was a complete surprise.
The true test of a mathematical idea is its ability to inspire further questions.
A quarry manager needs the precision of an engineer and the vision of a poet.
In looking for someone to hire, you look for three qualities: integrity, intelligence, and energy. But the most important is integrity because if they don't have that, the other two qualities, intelligence and energy, are going to kill you.
勇敢一点，冒险一试，没有什么能替代经验。
我曾把许多东西握在手中，但都失去了；但无论我把什么放在上帝的手中，我仍然拥有它。