If we cut up beasts simply because they cannot prevent us and because we are backing our own side in the struggle for existence, it is only logical to cut up imbeciles, criminals, enemies, or capitalists for the same reasons.

C. S. Lewis (1898-1963) English writer, literary scholar, lay theologian [Clive Staples Lewis]
“Vivisection,” New England Anti-Vivisection Society pamphlet (1947)
    (Source)

Collected in God in the Dock, Part 2, ch. 9 (1970) [ed. Hooper].