The quality of this attitude (or the “feeling” of it) as a specific “state of consciousness” is difficult to observe, because (like pleasure or displeasure) it is always marginal to something else in the focus of attention, some object, judgment or action; but we can appreciate it in its variations by considering the very different degrees of “force, steadiness,” etc., which characterise several beliefs regarded as more or less probable. The degree of belief ought to correspond with the weight of evidence: if evidence for any judgment is complete and uncontradicted, it may be called 1, and the corresponding state of mind should be “certainty”; if evidence for it there is none, or if evidence for the contradictory judgment is complete, it may be called 0, and the state of mind “disbelief.” Between these extremes there is room for an infinite series of fractions, and for corresponding shades of doubt (which, of course, do not really occur); and in the middle, at ½, there should be suspension of judgment. But most of these refined attitudes are the luxury of a few men severely trained in estimating evidence, and by them enjoyed only in the departments they have been trained in. For the mass of mankind, a very few shades of confidence or dubiety fill up their scale of judgment-values; and these may be far from corresponding as they should do with the quantity or quality of the evidence; and the nearest they get to suspension of judgment is a state of hesitation between alternatives that by turns seem equally likely. Disbelief, though the opposite logically to belief, as rejection to acceptance, has, nevertheless, much in common with it—the character of finality and positiveness, which is often (perhaps always) derived from belief in something else which is incompatible with the given judgment.

When the attitude of belief is established in one’s mind by evidence clearly conceived, whether by the examination of facts or the weighing of arguments, it is called “conviction,” and so is the process of bringing it about; but if it results from considerations imperfectly appreciated, and from emotional appeals, especially when urged by another person, it may be called “persuasion,” though the word describes the process rather than the result. Most imagination-beliefs, including all superstitions, are persuasions.

It is generally admitted that the test of the strength of one’s belief is its influence upon our actions—where the test is practicable. With full belief one acts “confidently” (a significant verbal proposition!); in doubt, hesitatingly or cautiously; in disbelief, not at all, or in the sense of the contrary belief. But we cannot always judge of a man’s beliefs from his actions; for he may be actuated by several beliefs, and we do not know what they are. And popular actions that involve no loss or hardship may express mere assent without belief.

There is a kind of imagination-belief, and the purest kind, which has nothing to do with evidence: it is often called “make-believe” or “play-belief”: the entering into or contemplating some activity, which we know to have no direct bearing on our necessary interests, with as much ardour and absorption as if it were the only important thing in the world: as in games and sports, especially in drama and romance. This is one of the many things that do not astonish because they are so common; and the usual (and probably the true) explanation of it is, that this state of mind is of the utmost utility in giving zest to play, especially during youth. For many animals share in this spirit; and the young of the higher animals, which enjoy a long protected youth, pass the time chiefly at play, and thereby develop and train all their faculties, physical and mental. It somewhat outlasts youth in many animals, and conspicuously in ourselves, some having nothing better to do (and they might do worse), and others relieving from time to time the strain or tedium of work and, in some sort, prolonging youth into middle age; till play becomes gradually less engrossing.

This play-belief depends entirely upon imaginative excitement; and it shows that the attitude of belief may be adopted voluntarily, or fall upon us (as it were) by surprise and maintain itself for a time in great strength: with many at a melodrama it runs to anxiety, weeping and anguish; and this not only without evidence, but in spite of the knowledge that this is London, whose magistrates would never permit such doings: only one forgets London, with all its dull conventions of law and order. Attention is engrossed by the play.

Play-belief has the same traits as were said above to mark superstitions: (1) it becomes active on occasions, and otherwise disappears; (2) it is always modifiable for convenience or by a change of taste; (3) it loses its hold and tends to die out in a man as time goes on; (4) it is strengthened by the assent of an excited crowd; (5) the objects of such beliefs are very variable. We shall find that in other ways there is a close alliance between superstition and play. But, certainly, superstition has a much deeper hold upon our nature; for it not only excites fear and anxiety, but itself is born of those passions: the desire of security and confidence, the dread of impending and unknown perils, these are its life and strength. So that the wonder is that superstitions are not more enduring. And the truth seems to be that the tendency to adopt superstitions does endure at a certain level of mentality, though particular superstitious beliefs are mutable; just as in the individual, a disposition to play outlasts many particular modes of recreation.

Belief, then, is an attitude of mind in which we may find ourselves for good reasons, or for bad reasons, or for none at all; sometimes even slipping into it voluntarily or involuntarily when we know the situation is unreal; indeed, an attitude in which, in play or earnest, we pass our lives, unless something happens to arouse doubt or criticism.

§ 4. Causes and Grounds of Belief

The source, direct or indirect, of all belief is perception. In perception must be included, for subjective studies, introspection; though being difficult to keep steady, to repeat and to compare with the observation of other minds, it carries less conviction. As to perception we say that “seeing is believing”; and, in fact, an object holds the eye in a way that vouches for its own reality; but, if we suspect that our eyes deceive us, reassurance comes with the handling of the thing. Belief has sometimes been discussed as if it were chiefly concerned with ideas or the relations of ideas; and systems of philosophy have sought justification in the coherence of ideas, with little or no regard (not to say with contempt) for the coherence of ideas with perceptions. But nearly the whole of every man’s life (savage or philosopher) passes in an attitude of unquestioning belief in the evidence of his senses; and it is thence that belief extends to ideas on a presumption of their representing reality. We know that a perception may be fallible, but perceptions and the comparison of perceptions in the long run overrule everything else; and experimental methods consist in taking precautions against the errors of perception, and in bringing every hypothesis to the test of perception.

Further causes of belief are either Evidentiary, which (though often misleading) may generally be justified on reflection as raising some degree of probability, and which may, therefore, be called “grounds”; or Non-evidentiary, which (though very influential) cannot, on reflection, be justified as having any logical value, and are, therefore, causes only and not grounds.