(34) The four Ages of the Greek mystics--the Golden Age, the Silver Age, the Bronze Age, and the Iron Age--are metaphoric expressions referring to the four major periods in the life of all things. In the divisions of the day they signify dawn, midday, sunset, and midnight; in the duration of gods, men, and universes, they denote the periods of birth, growth, maturity, and decay. The Greek Ages also bear a close correspondence to the four Yugas of the Hindus: Krita-Yuga, Treta-Yuga, Dvapara-Yuga, and Kali-Yuga. Their method of calculation is described by Ullamudeian as follows: "In each of the 12 signs there are 1800 minutes; multiply this number by 12 you have 21600; e.g. 1800 X 12=21600. Multiply this 21600 by 80 and it will give 1,728,000, which is the duration of the first age, called Krita-Yuga. If the same number be multiplied by 60, it will give 1,296,000, the years of the second age, Treta-Yuga. The same number multiplied by 40 gives 864,000, the length of the third age, Dvapara-Yuga. The same multiplied by 20 gives 432,000, the fourth age, Kali-Yuga." (It will be noted that these multipliers decrease in inverse ratio to the Pythagorean tetractys: 1, 2, 3, and 4.)

(22) Critias: and by recounting the number of years occupied by the events mentioned he tried to calculate the periods of time. Whereupon one of the priests, a prodigiously old man, said, “O Solon, Solon, you Greeks are always children: there is not such a thing as an old Greek.” And on hearing this he asked, “What mean you by this saying?” And the priest replied, “You are young in soul, every one of you. For therein you possess not a single belief that is ancient and derived from old tradition, nor yet one science that is hoary with age.