The world is full of suffering, but it is also full of the overcoming of it.

Every failure in an experiment is a step closer to success.

Your reputation is your most important currency—protect it fiercely.

I think the greatest thing in life is to be able to give back.

自由确实珍贵；如此珍贵以至于必须谨慎配给。

The most important thing in life is to have a sense of purpose and to pursue it with passion.

真相很少简单，也从不完整。

The quarries we rehabilitate best become assets our grandchildren will thank us for.