That there is a personal, or private, dimension to religious and moral experience is obvious enough. On the face of things we may feel driven even to attach a sense which is essentially personal to the content of propositions relating to those areas of experience. ‘I know what I mean by what he says’, one might say. Or, it might be felt that there is a sense in which each man has a God who is uniquely his own. Just how far can we push this idea of the irreducibly personal meaning, the necessarily individual content to such a moral or religious concept? Can we, in the end, give it an acceptable and unequivocal logical form?