Comparative religion and philosophy show that the Thinker can regard itself as mortal, as immortal, as both mortal and immortal (the reincarnation model) or even as non-existent (Buddhism). It can think itself into living in a Christian universe, a Marxist universe, a scientific-relativistic universe, or a Nazi universe—among many possibilities. As psychiatrists and psychologists have often observed (much to the chagrin of their medical colleagues), the Thinker can think itself sick, and can even think itself well again. The Prover is a much simpler mechanism. It operates on one law only: Whatever the Thinker thinks, the Prover proves. To cite a notorious example which unleashed incredible horrors earlier in this century, if the Thinker thinks that all Jews are rich, the Prover will prove it. It will find evidence that the poorest Jew in the most run-down ghetto has hidden money somewhere.

As Dr. Leonard Orr has noted, the human mind behaves as if it were divided into two parts, the Thinker and the Prover.

The Thinker can think about virtually anything.
(...) The Prover is a much simpler mechanism. It operates on one law only: Whatever the Thinker thinks, the Prover proves. To cite a notorious example which unleashed incredible horrors earlier in this century, if the Thinker thinks that all Jews are rich, the Prover will prove it. It will find evidence that the poorest Jew in the most run-down ghetto has hidden money somewhere. Similarly, Feminists are able to believe that all men, including the starving wretches who live and sleep on the streets, are exploiting all women, including the Queen of England.

To prove cannot mean anything other than to bring the other person to my own conviction. The truth lies only in the unification of “I” and “You.” The Other of pure thought, however, is the sensuous intellect in general. In the field of philosophy, proof therefore consists only in the fact that the contradiction between sensuous intellect and pure thought is disposed, so that thought is true not only for itself but also for its opposite.

A thinker sees his own actions as experiments and questions — as attempts to find out something. Success and failure are for him answers above all.

Because thinkers are those people who are able to pierce into the future and catch glimpses of light and bring it down. Many people do not often see what you are seeing until years and years later.

To think is to run after insecurity, to be demoralized for grandiose trifles, to immure oneself in abstractions with a martyr's avidity, to hunt up complications the way others pursue collapse or gain. The thinker is by definition keen for torment.

Clarifying your thinking and explaining the origins of your ideas. (Why do I think this? What exactly do I think?) Challenging assumptions. (How do I know this is true? What if I thought the opposite?) Looking for evidence. (How can I back this up? What are the sources?) Considering alternative perspectives. (What might others think? How do I know I am correct?) Examining consequences and implications. (What if I am wrong? What are the consequences if I am?) Questioning the original questions. (Why did I think that? Was I correct? What conclusions can I draw from the reasoning process?)

Man, by thinking, can bring into his experience whatsoever he desires — if he thinks correctly, and becomes a living embodiment of his thoughts. This is not done by holding thoughts but by knowing the Truth.

Is there a thinker apart from thought?

No one can be a great thinker who does not recognize, that as a thinker his first duty is to follow his intellect wherever it may lead. Truth gains more even by the errors of one who, with due study and preparation, thinks for himself, than by the true opinions if those who only hold them because they do not suffer themselves to think.

Some people speak as if we were not justified in rejecting a theological doctrine unless we can prove it false. But the burden of proof does not lie upon the rejecter. I remember a conversation in which, when some disrespectful remark was made about hell, a loyal friend of that establishment said triumphantly, "But, absurd as it may seem, you cannot disprove it." If you were told that in a certain planet revolving around Sirius there is a race of donkeys who speak the English language and spend their time in discussing eugenics, you could not disprove the statement, but would it, on that account, have any claim to be believed? Some minds would be prepared to accept it, if it were reiterated often enough, through the potent force of suggestion.

The truth can be perceived only through thinking, as is proven by Augustine.

I believe that there is but ONE THINKER in the universe; that my thinking is His thinking, and that every man's thinking is an extension, through God, of every other man's thinking. I therefore think that the greater the exaltation and ecstasy of my thinking, the greater the standards of all man's thinking will be. Each man is thus empowered to uplift all men as each drop of water uplifts the entire ocean.

A philosopher may try to prove the truth of something he believed before he was a philosopher, but even if he succeeds, his belief never regains the untroubled character, and the settled place in his mind, which it had at first.