On account of its materialism, modern science has need of vivisection. The anti-vivisection movements are inspired by deeply moral motives. But it will not be possible to abolish vivisection in science until clairvoyance has been restored to medicine. It is only because clairvoyance has been lost that medicine has had to resort to vivisection. When man has regained conscious access to the astral world, clairvoyance will enable doctors to enter spiritually into the inner conditions of diseased organs and vivisection will be abandoned as worthless.
Source: Rudolf Steiner – GA 94 – An Esoteric Cosmology – Lecture IX: The Astral World – Paris, 2nd June 1906
Translated by Rene Querido