Ingersoll's story of the man that went down from heaven on a reduced-rate excursion ticket good for 30 days --- and tried to sell his return ticket.

While statistics say that 95 percent of all young men who enter business fail, this should not discourage any one. Go out with the spirit “sink or swim,”and a person will not sink.

We will continue to challenge ourselves.

科学的遗产是人类的进步。

科学的历史是其对象生产的历史。

"I write to destroy the lie, but I always end up creating it."

The most credible empirical research often comes from studies that have a clear and transparent design, where the assumptions are laid out for everyone to see.

Our greatest ability as humans is not to change the world, but to change ourselves.