If you want to be a great leader, remember to treat all people with respect at all times. For one, because you never know when you'll need their help. And two, because it's a sign you respect people, which all great leaders do.

There are only two ways to influence human behavior: you can manipulate it or you can inspire it.

There are two types of claims: those based on hard numbers and those based on slippery numbers.

There are two kinds of experts: academic experts and practical experts. One is not better than the other, but they are very different, and each offers very different value.