XX. (96) The fourth commandment has reference to the sacred seventh day, that it may be passed in a sacred and holy manner. Now some states keep the holy festival only once in the month, counting from the new moon, as a day sacred to God; but the nation of the Jews keep every seventh day regularly, after each interval of six days; (97) and there is an account of events recorded in the history of the creation of the world, comprising a sufficient relation of the cause of this ordinance; for the sacred historian says, that the world was created in six days, and that on the seventh day God desisted from his works, and began to contemplate what he had so beautifully created; (98) therefore, he commanded the beings also who were destined to live in this state, to imitate God in this particular also, as well as in all others, applying themselves to their works for six days, but desisting from them and philosophising on the seventh day, and devoting their leisure to the contemplation of the things of nature, and considering whether in the preceding six days they have done anything which has not been holy, bringing their conduct before the judgment-seat of the soul, and subjecting it to a scrutiny, and making themselves give an account of all the things which they have said or done; the laws sitting by as assessors and joint inquirers, in order to the correcting of such errors as have been committed through carelessness, and to the guarding against any similar offences being hereafter repeated. (99) But God, on one occasion, employed the six days for the completion of the world, though he had no need of any length of time for such a purpose; but each man, as partaking of a mortal nature, and as being in need of ten thousand things for the unavoidable necessities of life, ought not to hesitate, even to the end of his life, to provide himself with all requisites, always allowing himself an interval of rest on the sacred seventh day. (100) Is it not a most beautiful recommendation, and one most admirably adapted to the perfecting of, and leading man to, every virtue, and above all to piety? The commandment, in effect says: Always imitate God; let that one period of seven days in which God created the world, be to you a complete example of the way in which you are to obey the law, and an all-sufficient model for your actions. Moreover, the seventh day is also an example from which you may learn the propriety of studying philosophy; as on that day, it is said, God beheld the works which he had made; so that you also may yourself contemplate the works of nature, and all the separate circumstances which contribute towards happiness. (101) Let us not pass by such a model of the most excellent ways of life, the practical and the contemplative; but let us always keep our eyes fixed upon it, and stamp a visible image and representation of it on our own minds, making our mortal nature resemble, as far as possible, his immortal one, in respect of saying and doing what is proper. And in what sense it is said that the world was made by God in six days, who never wants time at all to make anything, has been already explained in other passages where we have treated of allegories.