
Faculty is given by Nature, but it is our own fault that we make a perverse use of it.
Letter to Van Helmont, quoted in The Ethics of Diet: A Catena of Authorities Deprecatory of the Practice of Flesh-eating https://archive.org/stream/ethicsofdietcate00will/ethicsofdietcate00will#page/n3/mode/2up by Howard Williams (London: F. Pitman, 1883), pp. 103-104.