Then he stated in set terms the auspices which he wished to be sent: on their being sent, Numa was declared king and came down from the seat of augury.
Having thus obtained the kingdom, he set about establishing anew, on the principles of law and morality, the newly founded city that had been already established by force of arms. When he saw that the inhabitants, inasmuch as men's minds are brutalized by military life, could not become reconciled to such principles during the continuance of wars, considering that the savage nature of the people must be toned down by the disuse of arms, he erected at the foot of Argiletum[18] a temple of Janus, as a sign of peace and war, that when open, it might show that the state was engaged in war, and when shut, that all the surrounding nations were at peace. Twice only since the reign of Numa has this temple been shut: once when Titus Manlius was consul, after the conclusion of the first Punic war; and a second time, which the gods granted our generation to behold, by the Emperor Cæsar Augustus, after the battle of Actium, when peace was established by land and sea. This being shut, after he had secured the friendship of all the neighbouring states around by alliance and treaties, all anxiety regarding dangers from abroad being now removed, in order to prevent their minds, which the fear of enemies and military discipline had kept in check, running riot from too much leisure, he considered, that, first of all, awe of the gods should be instilled into them, a principle of the greatest efficacy in dealing with the multitude, ignorant and uncivilized as it was in those times. But as this fear could not sink deeply into their minds without some fiction of a miracle, he pretended that he held nightly interviews with the goddess Egeria; that by her direction he instituted sacred rites such as would be most acceptable to the gods, and appointed their own priests for each of the deities. And, first of all, he divided the year into twelve months, according to the courses of the moon;[19] and because the moon does not fill up the number of thirty days in each month, and some days are wanting to the complete year, which is brought round by the solstitial revolution, he so regulated this year, by inserting intercalary months, that every twentieth year, the lengths of all the intermediate years being filled up, the days corresponded with the same starting-point of the sun whence they had set out. He likewise divided days into sacred and profane, because on certain occasions it was likely to be expedient that no business should be transacted with the people.