“
Believing is not to be reduced to thinking that such-and-such might be the case. It is not a weaker form of thinking, laced with doubt. Sometimes we speak like this: ‘I believe that the train leaves at 6:13', where ‘I believe that’ simply means that ‘I think (but am not certain) that’. Since the left hemisphere is concerned with what is certain, with knowledge of the facts, its version of belief is that it is just absence of certainty. If the facts were certain, according to its view, I should be able to say ‘I know that’ instead. This view of belief comes from the left hemisphere's disposition towards the world: interest in what is useful, therefore fixed and certain (the train timetable is no good if one can't rely on it). So belief is just a feeble form of knowing, as far as it is concerned.
But belief in terms of the right hemisphere is different, because its disposition towards the world is different. The right hemisphere does not ‘know’ anything, in the sense of certain knowledge. For it, belief is a matter of care: it describes a relationship, where there is a calling and an answering, the root concept of ‘responsibility’. Thus if I say that ‘I believe in you’, it does not mean that I think that such-and-such things are the case about you, but can't be certain that I am right. It means that I stand in a certain sort of relation of care towards you, that entails me in certain kinds of ways of behaving (acting and being) towards you, and entails on you the responsibility of certain ways of acting and being as well. It is an acting ‘as if’ certain things were true about you that in the nature of things cannot be certain. It has the characteristic right-hemisphere qualities of being a betweenness: a reverberative, ‘re-sonant’, ‘respons-ible’ relationship, in which each party is altered by the other and by the relationship between the two, whereas the relationship of the believer to the believed in the left-hemisphere sense is inert, unidirectional, and centres on control rather than care. I think this is what Wittgenstein was trying to express when he wrote that ‘my’ attitude towards the other is an ‘attitude towards a soul. I am not of the opinion that he has a soul.’ An ‘opinion’ would be a weak form of knowledge: that is not what is meant by a belief, a disposition or an ‘attitude’.
This helps illuminate belief in God. This is not reducible to a question of a factual answer to the question ‘does God exist?’, assuming for the moment that the expression ‘a factual answer’ has a meaning. It is having an attitude, holding a disposition towards the world, whereby that world, as it comes into being for me, is one in which God belongs. The belief alters the world, but also alters me. Is it true that God exists? Truth is a disposition, one of being true to someone or something. One cannot believe in nothing and thus avoid belief altogether, simply because one cannot have no disposition towards the world, that being in itself a disposition. Some people choose to believe in materialism; they act ‘as if’ such a philosophy were true. An answer to the question whether God exists could only come from my acting ‘as if’ God is, and in this way being true to God, and experiencing God (or not, as the case might be) as true to me. If I am a believer, I have to believe in God, and God, if he exists, has to believe in me. Rather like Escher's hands, the belief must arise reciprocally, not by a linear process of reasoning. This acting ‘as if’ is not a sort of cop-out, an admission that ‘really’ one does not believe what one pretends to believe. Quite the opposite: as Hans Vaihinger understood, all knowledge, particularly scientific knowledge, is no more than an acting ‘as if’ certain models were, for the time being, true. Truth and belief, once more, as in their etymology, are profoundly connected. It is only the left hemisphere that thinks there is certainty to be found anywhere.
”
”
Iain McGilchrist (The Master and His Emissary: The Divided Brain and the Making of the Western World)