A belief is a lever that, once pulled, moves almost everything in a person’s life. Are you a scientist? A liberal? A racist? These are merely species of belief in action. Your beliefs define your vision of the world; they dictate your behavior; they determine your emotional responses to other human beings. If you doubt this, consider how your experience would suddenly change if you came to believe one of the following propositions:

1. You have only two weeks to live.
2. You've just won the lottery prize of one hundred million dollars.
3. Aliens have implanted a receiver in your skull and are manipulating your thoughts.

These are mere words- until you believe them. once believed, they become part of the very apparatus of your mind, determining your desires, fears, expectations, and subsequent behavior.

Belief, that sacred faculty which prompts the decisions of our will, and knits into harmonious working all the compacted energies of our being, is ours not for ourselves but for humanity. It is rightly used on truths which have been established by long experience and waiting toil, and which have stood in the fierce light of free and fearless questioning. Then it helps to bind men together, and to strengthen and direct their common action. It is desecrated when given to unproved and unquestioned statements, for the solace and private pleasure of the believer; to add a tinsel splendour to the plain straight road of our life and display a bright mirage beyond it; or even to drown the common sorrows of our kind by a self-deception which allows them not only to cast down, but also to degrade us. Whoso would deserve well of his fellows in this matter will guard the purity of his beliefs with a very fanaticism of jealous care, lest at any time it should rest on an unworthy object, and catch a stain which can never be wiped away. It is not only the leader of men, statesmen, philosopher, or poet, that owes this bounden duty to mankind. Every rustic who delivers in the village alehouse his slow, infrequent sentences, may help to kill or keep alive the fatal superstitions which clog his race. Every hard-worked wife of an artisan may transmit to her children beliefs which shall knit society together, or rend it in pieces. No simplicity of mind, no obscurity of station, can escape the universal duty of questioning all that we believe. It is true that this duty is a hard one, and the doubt which comes out of it is often a very bitter thing. It leaves us bare and powerless where we thought that we were safe and strong. To know all about anything is to know how to deal with it under all circumstances. We feel much happier and more secure when we think we know precisely what to do, no matter what happens, than when we have lost our way and do not know where to turn. And if we have supposed ourselves to know all about anything, and to be capable of doing what is fit in regard to it, we naturally do not like to find that we are really ignorant and powerless, that we have to begin again at the beginning, and try to learn what the thing is and how it is to be dealt with — if indeed anything can be learnt about it. It is the sense of power attached to a sense of knowledge that makes men desirous of believing, and afraid of doubting.

A belief is a lever that, once pulled, moves almost everything in a person’s life.

Belief is a moral act for which the believer is to be held responsible.

Every mental act is composed of doubt and belief,
but it is belief that is the positive, it is belief
that sustains thought and holds the world together.

In adaptive terms, belief has been extraordinarily useful. It is, after all, by believing various propositions about the world that we predict events and consider the likely consequences of our actions. Beliefs are principles of action: whatever they may be at the level of the brain, they are processes by which our understanding (and misunderstanding) of the world is represented and made available to guide our behavior.

[U]ncomprimising belief carries much more weight than some special philosophical notions... [T]he great majority... can scarcely have any well-founded judgement concerning the correctness of certain important general ideas or doctrines. ...[T]he word "belief" can for this majority not mean "perceiving the truth of something" but... only... as "taking this as the basis for life." ...[T]his second kind of belief is much firmer... much more fixed... it can persist even against immediate contradicting experience... not... shaken by added scientific knowledge... sometimes... to the point where it seems completely absurd, and ends... only with the death of the believer. Science and history can teach us that this... may become a great danger... [S]uch belief has always belonged to the great forces in human history.

If belief consists in an emotional reaction of the entire man on an object, how can we believe at will? We cannot control our emotions.... But gradually our will can lead us to the same results by a very simple method: we need only in cold blood act as if the thing in question were real, and keep acting as if it were real, and it will infallibly end by growing into such a connection with our life that it will become real. It will become so knit with habit and emotion that our interests in it will be those which characterize belief.

A belief is what you know to be true because experience has made it evident to you. If you want to change your life, change your beliefs. If you want to change your beliefs, go out and have experiences that make them real to you. Not the opposite way around.

A belief is a question we have put aside so we can get on with what we believe we have to do.

To talk about belief is to inquire at the same time into its validity or truth. It is to enter into a critical study that is not without danger. There is no place for the facile skepticism that says it believes in nothing precisely because it is blind to what it does believe in. We have to be serious because our whole being is at stake here. When I ask what I believe in, I am "searching my conscience," as they used to put it. I am passing judgment on what I believe as this is brought to light. As one advances, a double movement takes place which causes one constantly to come across another belief that is often hidden but which also provides the pause needed to move on to its criticism. "As one advances" — we either have to advance here or be silent. I cannot say easily what I value or think just now, what I regard as true. I have to do something more difficult, which will undoubtedly involve some political evaluations, if I am to try to bring the roots of my beliefs to light.

The question of belief is a curious one, partaking of the wonders of childhood and the blind hopefulness of the very old; in all the world there is not someone who does not believe something. It might be suggested, and not easily disproven that anything, no matter how exotic, can be believed by someone. On the other hand, abstract belief is largely impossible; it is the concrete, the actuality of the cup, the candle, the sacrificial stone, which hardens belief; the statue is nothing until it cries, the philosophy is nothing until the philosopher is martyred.

To believe is to become what you believe

Those who know me moderately well will say that I am an assertive, hard-nosed pragmatist. I guess that judgment comes from the fact that I have a firm belief that the world can turn out to be better than it otherwise would be depending upon what individuals, particularly those who have luck on their side, do about it. What is more, I believe Americans, to quite a disproportionate degree, have luck on their side. It is my view that belief is the underlying and basic element of policy and action. First one must sort out matters of belief: who one is, in what relationship to whom, and what general direction in the realm of values is up and what direction is down. Then clear and rigorous logic, based upon a cold and unemotional assessment of the objective evidence concerning the relevant facts, and a careful analysis of the probable outcomes and probable material and moral costs of alternative courses of action, can help to get one from where one is to where one wants, and should want, to be.