- Satya Yuga or Krita Yuga - dhyana (meditation)
- Treta Yuga - yajna (sacrifice)
- Dvapara Yuga - archana (worship)
- Kali Yuga - daana (gifts)
- In the highest yuga, the great majority of the people can experience spirituality by direct intuitive realization of truth. The veil between the material and the transcendent realms becomes almost transparent. According to Natya Shastra, there is no Natya performances in the Krita Yuga because it is a period free from any kind of unhappiness or misery. Satya Yuga is also called the Golden Age.
- Treta Yuga is the mental age, mental power is harnessed, men are in power, and inventions dissolve the illusion of time. (Inventions are characteristic of both Dvapara and Treta yugas.)
- In Dwapara Yuga, science flourishes, people experience the spiritual in terms of subtle energies and rational choices, inventions are abundant, particularly those that dissolve the illusion of distance (between people and between things), and power is mostly in the hands of women. The end of this age is associated with the death of Krishna, and the events described in the Mahabharata.
- In the lowest phase, Kali Yuga, most people are aware only of the physical aspect of existence, the predominant emphasis of living is material survival, and power is mostly in the hands of men. People's relationship with the spiritual is governed predominantly by superstition and by authority.
Temples, wars, and writing are hallmarks of Dvapara and Kali yugas. In the higher ages (Treta and Satya), writing is unnecessary because people communicate directly by thought; temples are unnecessary because people feel the omnipresence of God; wars are rare but they do occur; one such war is described in the Ramayana.
The traditional timescale of the yugas is as follows:
- Satya Yuga or Krita Yuga - 1,728,000 years
- Treta Yuga - 1,296,000 years
- Dvapara Yuga - 864,000 years
- Kali Yuga - 432,000 years
Upon conclusion
of seventy-one (or sometimes seven) circuits of
this cycle, there is a period equally long
during which the world is inundated; then the
cycle begins again.
