Never take anything at face value. Dare to question and seek the truth.
Trust nothing but your own experience.
No facts to me are sacred; none are profane.
If [Barack] Obama or the boss or the newspapers or anyone else tells you they're doing this, that, or the other thing, dismiss it or assume the opposite is true, which it often is.
Question everything generally thought to be obvious.
What I'm doing is trying to get kids to pay attention, to look at the physical world more, and to question everything. I am trying to get kids out of the house and away from screens.
Learn avidly. Question repeatedly what you have learned. Analyze it carefully. Then put what you have learned into practice intelligently.