The process of thinking . . . is the process of defining identity and discovering causal connections.
All thinking is a process of identification and integration. Man perceives a blob of color; by integrating the evidence of his sight and his touch, he learns to identify it as a solid object; he learns to identify the object as a table; he learns that the table is made of wood; he learns that the wood consists of cells, that the cells consist of molecules, that the molecules consist of atoms. All through this process, the work of his mind consists of answers to a single question: What is it? His means to establish the truth of his answers is logic, and logic rests on the axiom that existence exists. Logic is the art of non-contradictory identification. A contradiction cannot exist. An atom is itself, and so is the universe; neither can contradict its own identity; nor can a part contradict the whole. No concept man forms is valid unless he integrates it without contradiction into the total sum of his knowledge. To arrive at a contradiction is to confess an error in one’s thinking; to maintain a contradiction is to abdicate one’s mind and to evict oneself from the realm of reality.
That which you call your soul or spirit is your consciousness, and that which you call “free will” is your mind’s freedom to think or not, the only will you have, your only freedom, the choice that controls all the choices you make and determines your life and your character.
Thinking is not an automatic function. In any hour and issue of his life, man is free to think or to evade that effort. Thinking requires a state of full, focused awareness. The act of focusing one’s consciousness is volitional.
Psychologically, the choice “to think or not” is the choice “to focus or not.” Existentially, the choice “to focus or not” is the choice “to be conscious or not.” Metaphysically, the choice “to be conscious or not” is the choice of life or death.
Thinking is man’s only basic virtue, from which all the others proceed. And his basic vice, the source of all his evils, is that nameless act which all of you practice, but struggle never to admit: the act of blanking out, the willful suspension of one’s consciousness, the refusal to think — not blindness, but the refusal to see; not ignorance, but the refusal to know. It is the act of unfocusing your mind’ and inducing an inner fog to escape the responsibility of judgment — on the unstated premise that a thing will not exist if only you refuse to identify it, that A will not be A so long as you do not pronounce the verdict “It is.” Non-thinking is an act of annihilation, a wish to negate existence, an attempt to wipe out reality. But existence exists; reality is not to be wiped out, it will merely wipe out the wiper. By refusing to say “It is,” you are refusing to say “I am.” By suspending your judgment, you are negating your person. When a man declares: ‘Who am I to know?’ — he is declaring: “Who am I to live?”
This, in every hour and every issue, is your basic moral choice: thinking or non-thinking, existence or non-existence, A or non-A, entity or zero.
If devotion to truth is the hallmark of morality, then there is no greater, nobler, more heroic form of devotion than the act of a man who assumes the responsibility of thinking.
Thinking is a delicate, difficult process, which man cannot perform unless knowledge is his goal, logic is his method, and the judgment of his mind is his guiding absolute. Thought requires selfishness, the fundamental selfishness of a rational faculty that places nothing above the integrity of its own function.
A man cannot think if he places something — anything — above his perception of reality. He cannot follow the evidence unswervingly or uphold his conclusions intransigently, while regarding compliance with other men as his moral imperative, self-abasement as his highest virtue, and sacrifice as his primary duty. He cannot use his brain while surrendering his sovereignty over it, i.e., while accepting his neighbors as its owner and term-setter.
The concept “thought” is formed by retaining the distinguishing characteristics of the psychological action (a purposefully directed process of cognition) and by omitting the particular contents as well as the degree of the intellectual effort’s intensity.