No statement should be believed because it is made by an authority.

Certainly the game is rigged. Don't let that stop you; if you don't bet you can't win.

It was better to live with disappointment and frustration than to live without hope.

Belief gets in the way of learning.

Specialization is for insects... The race of man? He's a whole other creature.

To stay young requires unceasing cultivation of the ability to unlearn old falsehoods.

You can go wrong by being too skeptical as readily as by being too trusting.