...an optimistic mind-set finds dozens of possible solutions for every problem that the pessimist regards as incurable.

We look for the Secret - the Philosopher's Stone, the Elixir of the Wise, Supreme Enlightenment, 'God' or whatever...and all the time it is carrying us about...It is the human nervous system itself.

...reality is always plural and mutable.

...when dogma enters the brain, all intellectual activity ceases.

belief is the death of intelligence.

The world is, of course, nothing but our conception of it.