Genesis 17:9

The sign of the covenant. "And thou." The other party to the covenant now learns his obligation. "Every male of you shall be circumcised." Circumcision, as the rainbow, might have been in existence before it was adopted as the token of a covenant. The sign of the covenant with Noah was a purely natural phenomenon, and therefore entirely independent of man. That of the Abrahamic covenant was an artificial process, and therefore, though prescribed by God, was dependent on the voluntary agency of man. The former marked the sovereignty of God in ratifying the covenant and insuring its fulfillment, notwithstanding the mutability of man; the latter indicates the responsibility of man, the trust he places in the word of promise, and the assent he gives to the terms of the divine mercy. As the former covenant conveys a common natural blessing to all mankind and contemplates a common spiritual blessing, so the latter conveys a special spiritual blessing and contemplates its universal acceptance. The rainbow was the appropriate natural emblem of preservation from a flood; and the removal of the foreskin was the fit symbol of that removal of the old man and renewal of nature, which qualified Abraham to be the parent of a holy seed. And as the former sign foreshadows an incorruptible inheritance, so the latter prepares the way for a holy seed, by which the holiness and the heritage will at length be universally extended.

It is worthy of remark that in circumcision, after Abraham himself, the parent is the voluntary imponent, and the child merely the passive recipient of the sign of the covenant. Hereby is taught the lesson of parental responsibility and parental hope. This is the first formal step in a godly education, in which the parent acknowledges his obligation to perform all the rest. It is also, on the command of God, the formal admission of the believing parents' offspring into the privileges of the covenant, and therefore cheers the heart of the parent in entering upon the parental task. This admission cannot be reversed but by the deliberate rebellion of the child.

Still further, the sign of the covenant is to be applied to every male in the household of Abraham. This indicates that the servant or serf stands in the relation of a child to his master or owner, who is therefore accountable for the soul of his serf, as for that of his son. It points out the applicability of the covenant to others, as well as the children of Abraham, and therefore its capability of universal extension when the fulness of time should come. It also intimates the very plain but very often forgotten truth, that our obligation to obey God is not cancelled by our unwillingness. The serf is bound to have his child circumcised as long as God requires it, though he may be unwilling to comply with the divine commandments.