1. He was a supremely ethical nature. This perhaps was his fundamental peculiarity. Life could under no circumstances have seemed to him a trifle. The sense of responsibility was strong in him from the beginning. He was trained in a strict school; for the law of life prescribed to the race of which he was a member was a severe one; but he responded to it, and there never was a time when the deepest passion of his nature was not to receive the approval of God. Touching the righteousness which was in the law, he was blameless. After his conversion he laid bare unreservedly the sins of his past; but there were none of those dalliances with the flesh to confess into which soft and self-indulgent natures easily fall. He could never have allowed himself that which would have robbed him of his self-respect. His sense of honour was keen. When, in his subsequent life, he was accused of base things--lying, hypocrisy, avarice and darker sins--he felt intense pain, crying out like one wounded, and he hurled the accusations from him with the energy of a self-respecting nature. It was always his endeavour to keep a conscience void of offence not only towards God, but also towards men; and one of his most frequently reiterated injunctions to those who were in any way witnesses for Christ was to seek to approve themselves as honest men even to those who were without. He was speaking out of his own heart when he said to all, "Whatsoever things are true, whatsoever things are honest, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report: if there be any virtue, and if there be any praise, think on these things." I cannot help pausing here to say, that he will never be a preacher who does not know how to get at the conscience; but how should he know who has not himself a keen sense of honour and an awful reverence for moral purity? We are making a great mistake about this. We are preaching to the fancy, to the imagination, to intellect, to feeling, to will; and, no doubt, all these must be preached to; but it is in the conscience that the battle is to be won or lost.[43] The great difficulty of missionary work is that in the heathen there is, as a rule, hardly any conscience: it has almost to be created before they can be Christianized. In many parts of Christendom it is dying out; and, where it is extinct, the whole work of Christianity has to be done over again. 2. St. Paul's intellectual gifts are so universally recognised that it is hardly worth while to refer to them. They are most conspicuously displayed in his exposition of Christianity, on which I shall speak in the closing lecture. But in the meantime I remark, that his intellectual make was not at all that usually associated in our minds with the system-builder.