Sir John W. Salmond, Jurisprudence (1913)
“ Law is jus in respect of its contents, namely the rule of right; it is lex in respect of its source, namely, its recognition and enforcement by the state. We see, then, how it is that so many words for law mean justice also; since justice is the content or subject-matter of law, and from this subject-matter law derives its title. We understand also how it is that so many words for law do not also mean justice; law has another side and aspect from which it appears, not as justice realised and established, but as the instrument through which its realisation and establishment are effected. ”
