A. C. BHAKTIVEDANTA SWAMI PRABHUPADA – founder of the International Society for Krishna Consciousness.
An excerpt from his book: The Topmost Yoga System. (Page 14).
“As soon as you come to this point of being firmly convinced that you are not this body, that is called the brahma-bhuta stage of Brahman realisation. That is knowledge, real knowledge. Advancement of knowledge for eating, sleeping and mating is animal knowledge. A dog also knows how to eat, how to sleep, how to mate and how to defend. If our education extends only to these points (the dog is eating according to his nature, and we are also eating, but in a nice place, with nicely cooked food on a nice table), that is not advancement. The principle is still eating. Similarly, you may sleep in a very nice apartment in a six-story building or in a 122-story-building, and the dog may lie in a street, but when he sleeps and when you sleep, there is no difference. You cannot know whether you are sleeping in a sky-scraper or on the ground because you are dreaming something which has taken you from your bed. You have forgotten that your body is lying there on the bed, and you are flying in the air, dreaming. Therefore, to improve the sleeping method is not advancement of civilisation. Similarly, the dog has no social custom for mating. Whenever there is a she-dog, he mates on the street. You may mate very silently, in a secret place (although now people are learning how to mate like dogs), but the mating is there. The same principal applies to defending. A dog has teeth and nails with which he can defend himself, and you have atom bombs. But the purpose is defending,that’s all. Therefore, scripture says that human life is not meant only for these principles of life, bodily demands. There is another thing – a human being should be inquisitive to learn what is Absolute Truth. That education is lacking.“