This post answers two often repeated criticisms of Samkhya philosophy:
1. That Samkhya rejects god or is atheistic, and
2. That Samkhya cannot explain what causes the evolution of nature to begin.
It has often been said that Samkhya philosophy is atheistic. This is either a misunderstanding or a deliberate effort by the enemies of Samkhya to discredit the philosophy, or a combination of both. The true position of Samkhya is that it rejects the concept of an eternal Isvara in favor of an emergent Isvara.
[B]Eternal Isvara [/B]
By an eternal Isvara (Lord), we mean a god or deity who exists prior to the creation of the world, and who causes the world to come into being through an act of will or desire. The arguments against the existence of an eternal deity are technical, but can be summarized in layman’s terms. All actions are preceeded by motives that are either egoistic or altruistic. If Isvara creates the world for his own benefit (egoistic), then he is reduced to the level of a man. If Isvara is a perfect and eternal being, then what need does he have that is served by the creation of the world? Likewise, if his motives are altruistic, then why would he create a world full of suffering and evil? And we know that there are no purely altruistic acts, as there is always some personal benefit to be gained from the act of helping others.
Samkhya argues that there can be no creation or superintendence of creation without desire, since we know that desire is invariably at the root of all activity. If the Isvara has a connection with desire, then he cannot be an eternally free being, since freedom from desire is a pre-condition for freedom from material nature. So if Isvara creates the world from any act of will or desire, then the doctrine of liberation fails.
[B]Emergent Isvara[/B]
Through dispassion is absorption into Prakriti - Samkhya-Karika: 45
The concept of an emergent Isvara is based on the belief that, through the practice of dispassion, the highest yogis eventually merge into Prakriti, where they remain for a very long time. However these yogis have not yet achieved liberation, and so they must eventually be reborn. Such a yogi is believed to be reborn as the omniscient Isvara, who is the first soul to emerge at the beginning of a cycle of creation, and whose external investment (body) consists of Mahat (the first principle).
For he becomes the all-knower and all-doer Samkhya-Pravachana-Sutram III:56
[B]The Cycle of Evolution Begins[/B]
According to Samkhya, the unmanifest Prakriti that exists before the creation of the world consists of the gunas in a state of equilibrium. When the equilibrium is disturbed, the gunas start to manifest as nature, and a new cycle of evolution begins. But what causes the equilibrium to be disturbed?
Samkhya says that Prakriti is not directed to act or acted upon by any external force, but acts spontaneously of its own accord. But although Prakriti acts spontaneously of its own accord, it is subservient to the Purusa, in the sense that it acts for the benefit of the Purusa. Similar to the way a mother produces milk spontaneously for the benefit of the infant, Prakriti acts spontaneously for the benefit of the emergent Isvara simply through the proximity of the two. The emergent Isvara needs to complete his karma, which is to be the all knowing Isvara for the current cycle of evolution. This is the meaning of Yoga Sutra I.25 regarding Isvara: In him, the seed of omniscience is unsurpassed. (Georg Feuerstein translation) Here, bija is the seed of rebirth.