M. Valentine, Theoretical Ethics
“ The universal recognition of this distinction, revealed in every man's consciousness, involved in the organic relations of society, testified to everywhere in the pages of history, embodied essentially in the religious nature and sentiments of mankind, woven into general literature, found to-day unmistakably in the thinking, laws and customs of all races and tribes, and acknowledged in the philosophical view of humanity wherever man is studied, irreducible as a fact by any account of its genesis or explanation of its significance, presents the occasion and primary materials of ethical science. ”
