Quotes in Doubt

Since all models are wrong the scientist must be alert to what is importantly wrong. It is inappropriate to be concerned about mice when there are tigers abroad.

Managers must have the discipline not to keep pulling up the flowers to see if their roots are healthy.

If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things.

To have doubted one's own first principles is the mark of a civilized man.