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The Philosophy of Yāmunācārya [CH. XIX from ākāśa, which offers room for the movement of things. Akāśa is not a mere vacuity or non-occupiedness, but a positive entity.
Thus it is seen that the indeterminate matter of prakrti, with its three qualities, passes through many stages and at last exhibits the phenomenal world, which produces happiness and misery in accordance with a man's destiny (adrsta) and good or bad deeds. The force of adrçța is not a separate entity, but the favour and disfavour of Isvara, which works in accordance with the good or bad deeds of men.