Hinduism is the oldest religion we still carry with us into modern times but Hinduism was not the oldest form of religion, simply an organized form of it that persists today. It does however believe in an interconnectedness of spirit, the flow of energy. They also believed that to find the truth in the universe one had to look into oneself. The Ancient Hindu's also believed that they were last and the weakest of those that could still contact that flow of spirit. If you follow the timeline of science there is a lot of time for people to communicate with speech alone, predating even speech there was a time when "humans" could not even communicate with each other. Back then they were alone in their own mind. They could, for that reason, feel the universe's rhythmic pulse within themselves. God is the whole universe, God is the energy that flows through all things. They understood this and because they were in contact with the whole universe they were intact with God. In today's world the mind is jumbled with too many things making it impossible for people to feel the universe inside yourself. The human mind goes back a lot further than the ideas it created. We are still trying to figure out the universe from looking around us which is as the creator intended, it's why we do it. We can no longer look inside ourselves so we desperately search outside to find the answers. The failure of any one modern religion to fully explain creation is completely understandable. The only true "religion" would be the ideas that the creator gave to the very first beings that began to break away from being fully connected with God. Science is made of facts and facts are always to be read and loved for it is God who was the creator of all things, but no fact can disprove a God it only majorly destroys the teachings of Modern Organized Religions. Its safe to say that the truth about religion as a whole and complete spiritual understanding was lost a long time before anything modern.