This prelude certainly confines the Decalogue to the people of Israel. Their deliverance is the ground on which the law is rested, therefore, plainly, the obligation can be no wider than the benefit. But though we are not bound to obey any of the Ten Commandments, because they were given to Israel, they are all, with one exception, demonstrably, a transcript of laws written on the heart of mankind; and this fact carries with it a strong presumption that the law of the Sabbath, which is the exception referred to, should be regarded as not an exception, but as a statute of the primeval law, witnessed to by conscience, republished in wondrous precision and completeness in these venerable precepts. The Ten Commandments are binding on us; but they are not binding as part, though the fundamental part, of the Jewish law.
Two general observations may be made. One is on the negative character of the commandments as a whole. Law prohibits because men are sinful. But prohibitions pre-suppose as their foundation positive commands. We are forbidden to do something because we are inclined to do it, and because we ought to do the opposite. Every 'thou shalt not' implies a deeper 'thou shalt.' The cold negation really rests on the converse affirmative command.
The second remark on the law as a whole is as to the relation which it establishes between religion and morality, making the latter a part of the former, but regarding it as secured only by the prior discharge of the obligations of the former. Morality is the garb of religion; religion is the animating principle of morality. The attempts to build up a theory of ethics without reference to our relations to God, or to secure the practice of righteousness without such reference, or to substitute, with a late champion of unbelief, 'the service of man' for the worship of God, are all condemned by the deeper and simpler wisdom of this law. Christians should learn the lesson, which the most Jewish of the New Testament writers had drawn from it, that, 'pure and undefiled service' of God is the service of man, and should beware of putting asunder what God has joined so closely.
II. The first commandment bears in its negative form marks of the condition of the world when it was spoken, and of the strong temptation to polytheism which the Israelites were to resist. Everywhere but in that corner among the wild rocks of Sinai, men believed in 'gods many.' Egypt swarmed with them; and, no doubt, the purity of Abraham's faith had been sadly tarnished in his sons. We cannot understand the strange fascination of polytheism. It is a disease of humanity in an earlier stage than ours. But how strong it was and is, all history shows. All these many gods were on amicable terms with one another, and ready to welcome newcomers. But the monotheism, which was here laid at the very foundation of Israel's national life, parted it by a deep gulf from all the world, and determined its history.
The prohibition has little force for us; but the positive command which underlies it is of eternal force. We should rather think of it as a revelation and an invitation than as a mere command. For what is it but the declaration that at the centre of things is throned, not a rabble of godlings, nor a stony impersonal somewhat, nor a hypothetical unknowable entity, nor a shadowy abstraction, but a living Person, who can say 'Me,' and whom we can call on as 'Thou,' and be sure that He hears? No accumulation of finite excellences, however fair, can satisfy the imagination, which feels after one Being, the personal ideal of all perfectness. The understanding needs one ultimate Cause on which it can rest amid the dance of fleeting phenomena; the heart cannot pour out its love to be shared among many. No string of goodly pearls will ever give the merchantman assurance that his quest is complete. Only when human nature finds all in One, and that One a living Person, the Lover and Friend of all souls, does it fold its wings and rest as a bird after long flight.