The “principle of utility,” understood as Bentham understood it, and applied in the manner in which he applied it through these three volumes, fell exactly into its place as the keystone which held together the detached and fragmentary component parts of my knowledge and beliefs. It gave unity to my conceptions of things. I now had opinions; a creed, a doctrine, a philosophy: in one among the best senses of the word, a religion; the inculcation and diffusion of which could be made the principal outward purpose of a life.

John Stuart Mill, Autobiography, in The Collected Works of John Stuart Mill, Toronto, 1988, vol. 1, p. 69