From a proper knowledge of this universal doctrine of Scripture, we must then proceed to other doctrines less universal, but which, nevertheless, have regard to the general conduct of life, and flow from the universal doctrine like rivulets from a source: such are all particular external manifestations of true virtue, which need a given occasion for their exercise; whatever is obscure or ambiguous on such points in Scripture must be explained and defined by its universal doctrine; with regard to contradictory instances, we must observe the occasion and the time in which they were written. For instance, when Christ says, "Blessed are they that mourn, for they shall be comforted," we do not know, from the actual passage, what sort of mourners are meant; as, however, Christ afterwards teaches that we should have care for nothing, save only for the kingdom of God and His righteousness, which is commended as the highest good (see Matt. vi. 33), it follows that by mourners He only meant those who mourn for the kingdom of God and righteousness neglected by man: for this would be the only cause of mourning to those who love nothing but the Divine kingdom and justice, and who evidently despise the gifts of fortune. So, too, when Christ says: "But if a man strike you on the right cheek, turn to him the left also," and the words which follow. If He had given such a command, as a lawgiver, to judges, He would thereby have abrogated the law of Moses, but this He expressly says He did not do (Matt. v. 17). Wherefore we must consider who was the speaker, what was the occasion, and to whom were the words addressed. Now Christ said that He did not ordain laws as a legislator, but inculcated precepts as a teacher: inasmuch as He did not aim at correcting outward actions so much as the frame of mind. Further, these words were spoken to men who were oppressed, who lived in a corrupt commonwealth on the brink of ruin, where justice was utterly neglected. The very doctrine inculcated here by Christ just before the destruction of the city was also taught by Jeremiah before the first destruction of Jerusalem, that is, in similar circumstances, as we see from Lamentations iii. 25-30. Now as such teaching was only set forth by the prophets in times of oppression, and was even then never laid down as a law; and as, on the other hand, Moses (who did not write in times of oppression, but--mark this--strove to found a well-ordered commonwealth), while condemning envy and hatred of one's neighbor, yet ordained that an eye should be given for an eye, it follows most clearly from these purely Scriptural grounds that this precept of Christ and Jeremiah concerning submission to injuries was only valid in places where justice is neglected, and in a time of oppression, but does not hold good in a well-ordered state.