Dear Jasper:
You ask me about the "three qualities sprung from Nature," mentioned in the Bhagavad-Gîtâ. They exist potentially (latent) in Purush (Spirit), and during that time spoken of in the Bhagavad-Gîtâ as the time when He produces all things after having devoured them (which is the same thing as Saturn devouring his children), they come forth into activity, and therefore are found implicating all beings, who are said not to be free from their influence.
"Being" here must refer to formed beings in all worlds. Therefore in these forms the qualities exist [for form is derived from Nature=Prakriti=Cosmic Substance.—J. N.], and at the same time implicate the spectator (soul) who is in the form. The Devas are gods—that is, a sort of spiritual power who are lower than the Ishwara in man. They are influenced by the quality of Satwa, or Truth. They enjoy a period of immense felicity of enormous duration, but which having duration is not an eternity.
It is written: "Goodness, badness, and indifference—the qualities thus called—sprung from Nature, influence the imperishable soul within the body."
This imperishable soul is thus separated from the body in which the qualities influence it, and also from the qualities which are not it. It is Ishwara. The Ishwara is thus implicated by the qualities.
The first or highest quality is Satwa, which is in its nature pure and pleasant, and implicates Ishwara by connection with pleasant things and with knowledge. Thus even by dwelling in Satwa the soul is implicated.
The second quality is Raja and causes action; it implicates the soul because it partakes of avidity and propensity, and causing actions thus implicates the soul.
The third, Tamo quality, is of the nature of indifference and is the deluder of all mortals. It is fed by ignorance.
Here, then, are two great opposers to the soul, ignorance and action. For action proceeding from Raja assisted by Satwa does not lead to the highest place; while ignorance causes destruction. Yet when one knows that he is ignorant, he has to perform actions in order to destroy that ignorance. How to do that without always revolving in the whirl of action [Karma, causing rebirths.—J. N.] is the question.
He must first get rid of the idea that he himself really does anything, knowing that the actions all take place in these three natural qualities, and not in the soul at all. The word "qualities" must be considered in a larger sense than that word is generally given.