It is beyond the power of reason to prescribe ends. Give unto Cæsar the things that are Cæsar's. Reason can determine means to ends, and the mutual consistency of different ends. Of ends as such it is altogether beyond its scope and capacity to say, "choose this, reject that".
(R. F. Harrod, "Utilitarianism Revised," Mind, n.s., 45 [April 1936]: 137-56, at 144)
