Aryans were hard working, well organized people. They advanced economically and might have realized that the material well being was not sufficient for the happy life, which is true for all time. They might have started to explore the cause of unhappiness. Many great kings, rich ministers, traders, farmers couldn't have found happiness besides having all the luxuries. So, they might have started to abandon their kingdoms, houses, farms in search of happiness. Pali literature says that even Sudras renounced and became great Yogi. This might be the starting point of the real spirituality.
They became Aranyaka, the one who lives in the place where there is no rule of any king, ie in solitute. Through their search they discovered ?Rita?, which means the law of nature. They figured out many mysteries and secrets of the nature, through their own effort, through silence observation of their mind and body or themselves. They were known as "Rishi", Ritang Issati ti Rishi = one who knows the laws of nature is Rishi. They didn't bother to discover any law that governs the matter, all the laws that they found were related to the mind, because undisciplined chaotic mind was the cause of misery. They were looking for cause of misery not the cause of discomfort.
First thing they might have figured out that the mind needed be controlled, tamed and disciplined. Prerequisite for that was solitude, so they left home to avoid disturbance. This was how the tradition of RENOUNCIATION might have started, which is one of the Pillar for the truth seekers. If the mind is too wild, it is hard to control or tame, so relatively calm mind was the next prerequisite. If one is morally corrupt one can't have a calm mind, there is always storm of disturbance in immoral mind. This might be the deep origin of MORALITY in Jambu Dipa, which has become another Pillar for truth seekers, and symbol of Indian subcontinant.
Then they might have tried different techniques to get mastery over the mind. They might have tried some means to focus the mind; the means could be anything related to sense organs. For example; Naad = Concentrate on sound of the surrounding, ear sense organ. Kasin = Concentrate on some luminescent spot- eye sense organ. Anapana = Concentrate on your breath, body sense organ, tange. Chittanupassana = Concentrate on your thoughts. Concentrating on taste- tong sense organ and concentrating on semll- nose sense organs are not that practical so it is not found that much in literature. Mantra = Concentration on words. They derived the words of best vibration like, Ohm, Hring, Cling, Fat etc.
Through concentration they started to reach very higher state of mind. They started to find infinite tranquility, that's why they named it as Samath, the equanimity, no bothering state. These absorption Samadhis were known as atha Samapatti. Moreover they claimed that they found unusual psychic power out of these Samadhis. They claimed that they have seen other worlds, like Deva Loka, Brahma Loka, Preta Loka, Narak Loka etc. They could hear ultra/infra Sonics, they could see what is not visible to normal eye, they could be lighter than the air and fly, they could disappear here and appear some other remote place instantly, they could see and communicate with invisible human beings.
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