Gradation of Human Brain

Human brain is most complex and hardest to understand. It is not only limited to what we are doing, as we are going towards advancements in technology, we are using our mind less and thus generations by generation we are losing thinking capabilities and brain-power. I am gonna tell you my theory of gradation of human brain starting from the era of Treta yuga. According to me at the time of birth lord Rama was normal infant, at that time the teachers (Gurus) who taught all members of royal families teaches them to control over their body and enable higher dimensions of thinking, that knowledge only belonged to them (Gurus), that is why warriors like them can summon the arrows magically, but it wasn't magic it was just matter manipulation through brain. If you know according to all the peoples in the era of Mahabharata in Dwapar yuga only 3 peoples know that Surya Putra Vaikartan Karn belongs to the royal family, but many didn't know that, so Karn has to be in disguise to learn the "Brahmastra" from Bhrugu-Shreshta Lord Parashurama. this knowledge taught by gurus went on degrading, as demons started interacting more with goodness, and the normal people didn't get that knowledge. As time passes away that knowledge of controlling body and brain gets disappeared and due to this only few people, if they got any way to seek that knowledge like Aryabhatta and other well knows, because what they did was amazing, like by just being on earth they have done research on planets and solar system and which was more accurate, of which current "Panchang"s make use , but the current telescopes couldn't do that, that's all about imagination and brain power, there is a quote by Albert Einstein "Imagination is more important than knowledge" because it was the imagination of brain which makes them go beyond galaxies and stars for research by resting on this Mother Earth.