It may be pointed out, however, that if man is a partly spiritual as well as a partly material being, which we have already admitted; then the existence of some spiritual sense, or faculty, by which to perceive spiritual truths, just as the body has material senses by which to perceive material objects, cannot be thought incredible. And this is what faith claims to be; it is a means to spiritual discernment, and may be compared to eyesight. It does not enable us to believe what we might otherwise think to be untrue; but it enables us to know for certain, what we might otherwise think to be only probable (_e.g._, the existence of God). In the same way a blind man might, by feeling, think it probable that there were a certain number of pictures in a room, but if he could _see_, he would know for certain. And, just as a man, who had always been blind, ought not to reject the testimony of those who see, so a man who has no faith ought not to reject the testimony of those who have. And the existence of such a faculty will account for the very different views taken of Christianity by men of apparently equal intelligence and candour. Still, it may be asked, why should some persons be given this faculty of faith, while others are not? The subject is no doubt a difficult one. But very possibly the faculty is _latent_ in every one, only it needs (like other faculties) to be exercised and developed. And the man himself may be responsible for whether he takes suitable means (prayer, etc.) for doing this. However, we need not pursue this subject, since, as said above, no arguments can prove, or disprove Christianity to those who believe by faith. But now comes the most important part of the objection. Granting, it is said, that the subject is a difficult one, and demands a long investigation, yet when we do go through the arguments on both sides the conclusion is not irresistible. In short, why are not the evidences in favour of Christianity _stronger_? Of course they might be so, but we have no reason for thinking that they would be. In our ordinary daily life we have never absolute certainty to guide us, but only various degrees of probability. And even, in Natural Religion, the reasons for believing in a Personal God and the freedom and responsibility of man, though to most people quite convincing, are certainly not irresistible; since, as a matter of fact, some men resist them.