There are two sorts of objects for meditation in the twenty-five categories of the Sankhyas, (1) the twenty-four insentient categories of Nature, and (2) the one sentient Purusha. This part of Yoga is based entirely on Sankhya philosophy, about which I have already told you. As you will remember, egoism and will and mind have a common basis, the Chitta or the mind-stuff, out of which they are all manufactured. The mind-stuff takes in the forces of nature, and projects them as thought. There must be something, again, where both force and matter are one. This is called Avyakta, the unmanifested
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