The Basis of Morality by Part 2 Chapter 2 Page 5

consequence; how, then, can such a conception be attached to these alleged moral laws (as an instance of which he adduces “thou shalt not lie”)?

Everyone knows, and he himself admits, that no such consecution for the most part takes place; the reverse, indeed, is the rule.

In scientific Ethics before we admit as controlling the will other laws besides that of motivation-laws which are original and independent of all human ordinance — we must first prove and deduce their existence; that is, provided in things ethical we are concerned not merely with recommending honesty, but with practising it. Until that proof be furnished, I shall recognise only one source to which is traceable the importation into Ethics of the conception Law, Precept, Obligation.