It is true as the Hindus say that there was a golden age, then a silver age, a copper age, and an iron age. Certainly we are in the iron age. Never before in any period of history was there such grossness and denseness as mankind shows today. And it has come about by the law of gravitation. When the consciousness is absorbed in the gross matter then a person gravitates towards the earth. When the consciousness is released from the gross matter then it soars towards heaven.