The Humanitarian theory wants simply to abolish Justice and substitute Mercy for it. … Mercy, detached from Justice, grows unmerciful. That is the important paradox. As there are plants which will flourish only in mountain soil, so it appears that Mercy will flower only when it grows in the crannies of the rock of Justice: transplanted to the marshlands of mere Humanitarianism, it becomes a man-eating weed, all the more dangerous because it is still called by the same name as the mountain variety.
(God in the Dock: Essays on Theology and Ethics , 294).