Arthur Conan Doyle on animal suffering

A great quote from Sir Arthur Conan Doyle (1859-1930):

At the moment our human world is based on the suffering and destruction of millions of non-humans.  To perceive this and to do something to change it in personal and public ways is to undergo a change of perception akin to a religious conversion.  Nothing can ever be seen in quite the same way again because once you have admitted the terror and pain of other species you will, unless you resist conversion, be always aware of the endless permutations of suffering that support our society.

I grew up with Sherlock Holmes, thanks to my mother, and recently have thoroughly enjoyed the tv adaptations starring Jeremy Brett.  But I had no idea this quote existed, and am indebted to Sue Grisham of EpiscoVeg for passing it along (via Jeffrey Masson).