Disputing in his Panstrat. vol. iii. book xv. chap. iii. against Bellarmine, [Chamier] teaches that the true and determinate difference between the law of works and that of faith, is the condition of works and of faith; that is, that the law of works proposes salvation, upon condition of performing the law. But the law of faith proposes it, upon condition only of believing in Christ. Lest, however he should leave any thing unexplained, he observes, that conditions in contracts are of two kinds; some of which may be called antecedent, others consequent. He calls these antecedent, which give rise to the contract, according to the maxim, I give, that thou mayest give, as when one sells a field for a certain sum of money. But the consequent conditions are added to the antecedent, as following from them: which indeed are mutual between the parties, but oblige the one only: so that the other is bound to do no more on their account: As if one having given or sold a plot of ground, should assign an annuity to be laid out upon the poor. Now conditions of that kind, when not performed, usually disannul the contract: and yet they do not constitute it. Nay, there would be no annuity, except the sale were already full and complete. This distinction that very learned divine applies to the present purpose, in the following manner: The law of works requires the fulfilling of the law as an antecedent condition, without which, not only no man can enter upon the possession of eternal life, but cannot so much as have a right to it. But the law of faith does not admit of works as a condition p 151 in this sense, but only in the other: viz. that by virtue of the life already given through faith, works are necessary, so that he who shows no works, falls from every right which he had, or rather seemed to have, on account of his external vocation; although otherwise, works are not the causes of the life to be given. Thus far Chamier: compare Tuckney in his Theological Prelections, p. 233.
Herman Witsius, Conciliatory or Irenical Animadversions on the Controversies Agitated in Britain, trans. Thomas Bell (Glasgow: W. Lang, 1807), 149–51.