Vivisection is condemned by the Teaching because it is absolutely cruel and because it contaminates the Subtle World.
When an animal is in pain and suffering, he is already functioning on the astral plane, and all his pain and agony spread over the astral world.
When an animal is under vivisection, he emanates some sort of poison which is attractive to every kind of subtle germ. This poison is released in this world and in the astral world, contaminating both.
An animal cannot understand why he is used in cruelty, why he is cut, injected, operated on. The fear and rejection that he expresses toward the cause of suffering create psychic poison.
Those doctors who are busy with vivisection will have a terrible time in the Subtle World, no matter what motives they had in their mind. In the Subtle World, the end does not justify the means. Those who caused suffering to animals will pay a high price for their cruelty in both worlds.
Because animals are weaker than human beings, their rights must be protected more intensely than the rights of human beings. For example, we protect the rights of children more than the rights of adults.
When animals are treated in the right way, they emanate certain vibrations which increase our joy and open our hearts. A good friendship begins to be established between the man and the animal, which grows into Infinity. We must remember that animals are our little brothers, and we have the responsibility to take care of them.