The most dangerous phrase in business is: 'We've always done it this way.'

Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.

The only thing that separates successful people from the others is hard work and determination.

"Mental life is a continuous adjustment to the environment."

The truth is not always beautiful, but the pursuit of it is.

对于每一位专家，都会有一个同等的或者完全相反的专家。但对于每一个事实，并不一定就有一个同等的或者相反的事实存在。