I do not deny, of course, that there may be intellectual difficulties cropping up in connection with the acceptance of the message of salvation in Jesus Christ, but as, on the one hand, I am free to admit that many a man may be putting a true trust in Christ which is joined with a very hesitant grasp of some of the things which, to me, are the very essence and heart of the Gospel; so, on the other side, I would have you remember that there is necessarily a moral quality in our attitude to all moral and religious truth; and that sin does not cease to be sin because its doer is a thinker or has systematised his rejection into a creed. Though it is not for us to measure motives and to peer into hearts, at the bottom there lies what Christ Himself put His finger on: 'Ye _will_ not come to me that ye might have life.' Then, still further, let me remind you that our Lord here presents this fact of man's unbelief as being an instance in which we may see what the real nature of sin is. To use learned language, it is a 'typical' sin. In all other acts of sin you get the poison manipulated into various forms, associated with other elements, disguised more or less. But here, because it is purely an inward act having relation to Jesus Christ, and to God manifested in Him, and not done at the bidding of the animal nature, or of any of the other strong temptations and impulses which hurry men into gross and coarse forms of manifest transgression, you get sin in its essence. Belief in Christ is the surrender of myself. Sin is living to myself rather than to God. And there you touch the bottom. All those different kinds of sin, however unlike they may be to one another--the lust of the sensualist, the craft of the cheat, the lie of the deceitful, the passion of the unregulated man, the avarice of the miser--all of them have this one common root, a diseased and bloated regard to self. The definition of sin is,--living to myself and making myself my own centre. The definition of faith is,--making Christ my centre and living for Him. Therefore, if you want to know what is the sinfulness of sin, there it is. And if I may use such a word in such a connection, it is all packed away in its _purest_ form in the act of rejecting that Lord.