Brahma Jnana and Tantra Jnana  (English, Paperback, Ramaraj)

So material world, there is a creation, there is a maintenance and there is destruction, but in the spiritual world, there is no creation, there is no destruction. It's always there. In the material world, there is three Kala, there is past, present, and future. But in the spiritual world, there is only one Kala that is present. Past, future is not there. In the spiritual world, there is only present. Lord Krishna is always youthful. Navayouvanam. So which means, he never becomes old, his body never becomes old. that is the spiritual world.