Division of Yugas
Development of Dharma is gradual over 12000 years as described above and there is an ascending arc and descending arc. This half cycle, a period of 12000 years is divided into four yugas as follows:
Kali Yuga
Sun passes through 1/20th of the period out of the total 24000 years = 1200 years. (Note that there are two Kali Yugas in a cycle one ascending and one descending each equalling to 1200 years).
Dharma, the mental virtue is in the first stage and only a quarter developed. Human intellect can understand only gross material creation.
Dwapara Yuga
Sun passes through 2/20th of the period out of the total 24000 years = 2400 years. (Note that there are two Dwapara Yugas in a cycle one ascending and one descending each equalling to 2400 years).
Dharma, is in the second stage and half developed
Human intellect can grasp the fine matters or electricities and their attributes – which are the creating principles of the external world.
Treta Yuga
Sun passes through the 3/20 th of the period of total 24000 years = 3600 years. (Note that there are two Treta Yugas in a cycle one ascending and one descending each equalling to 3600 years).
Dharma is in the third stage of development
Human intellect can undertand divine magnetism, the source of all electrical forces on which the creation depends for it’s existence.
Satya Yuga (also called Krita Yuga)
Sun passes through the 4/20th of the period of total 24000 years = 4800 years. (Note that there are two Satya Yugas in a cycle one ascending and one descending each equalling to 4800 years).
Dharma, the mental virtue is fourth stage and completes development during this period. The human intellect can comprehend all including God.