Sanatana Dharma is often called Manava Dharma, and it is usually thought that this expression means the Dharma expounded by Manu. But it also means Human Dharma, the path by which an aspirant can become a true human being, one who is fulfilling the very purpose of existence: the passage from humanity to divinity. This is one of the reasons why so few yogis succeed. They try to scramble up the ladder to divinity before they are even genuine human beings. Only those who follow the principles of Sanatana Dharma, especially the yama-niyama observances, have any chance of achieving humanity.
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It is often very difficult for someone from the West who has very strong samskaras for both yoga and India to force themselves to take a very real look at contemporary Hinduism and honestly see what is foolish and what is wise. When I reached India I jumped in and a swam like a duck that had never seen a puddle, much less the marvelous ocean that is India. It was a love match. But after some years I had to brush the stars out of my eyes and take a real, honest and uncompromising look at everything I so loved and accepted and reveled in. It took some time for me to get the ajnanatimira, the glaucoma of ignorance, out of my system. But at last I did, and I found that I loved India and its wisdom even more. But I had to distinguish between treasure and trash, and keep on doing so.
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