Of slightly later date than these two works were the four Sunan, founded partly on the earlier books, but built upon a stricter critical analysis of what should be accepted, and written after an even wider gathering of all the legends of the empire. Hence the Sunan include the earlier books, and the entire collection is commonly spoken of by the later name. When, however, we speak of these Sunan as a "critical" selection from the million legends, the modern reader must not think of this as implying modern scientific criticism and analytical accuracy. Each tale was chiefly accepted on the ground that, in the series of men by whom it was said to have been handed down through the generations, all the men were known and all were of reputed trustworthiness. That is to say, in an age already become notorious for its lack of veracity, a superficial confidence in individual veracity, extending back through many links for over two hundred years, was accepted as the ultimate proof of truth. The most widely read and quoted of the Sunan is that of Abu Da'ud, who sums up his own work by declaring that only four of all the thousands of religious rules he has gathered need be remembered by each man for his own religious guidance. These four laws Abu Da'ud gives as follows: "Actions will be judged according to intentions. The proof of a Moslem's sincerity is that he pays no heed to that which is not his business. No man is a true believer unless he desires for his brother that which he desires for himself. That which is lawful is clear, and that which is unlawful likewise, but there are certain doubtful things between the two, from which it is well to abstain." SELECTIONS FROM THE SUNAN OR, SAYINGS AND TRADITIONS OF MOHAMMED When God created the creation he wrote a book, which is near him upon the sovran throne; and what is written in it is this: "Verily my compassion overcometh my wrath." Say not, if people do good to us, we will do good to them, and if people oppress us, we will oppress them: but resolve that if people do good to you, you will do good to them, and if they oppress you, oppress them not again. God saith: Whoso doth one good act, for him are ten rewards, and I also give more to whomsoever I will; and whoso doth ill, its retaliation is equal to it, or else I forgive him; and he who seeketh to approach me one cubit, I will seek to approach him two fathoms; and he who walketh toward me, I will run toward him; and he who cometh before me with the earth full of sins, but joineth no partner to me, I will come before him with an equal front of forgiveness.