I. To those of you who acknowledge the obligation of a Sabbath, but change the day of its celebration from the _seventh_ to the _first_ day of the week, we would say, that while from the Law only you infer any obligation to sabbatize at all, yet make the particular time of sabbatizing to stand upon New Testament authority, we do not see how you can relieve yourselves from the charge of departing from the great principle contended for by Baptists, viz. That whatever is commanded by an institution, is to be learned from the law of the institution, and not from other sources. On this principle, you reject the logic of Pedobaptists, who, while they find the ordinance of _baptism_ in the New Testament, go back to the law of _circumcision_ to determine the subjects. You tell them, and very justly too, that the _law_ of the institution is the _only rule_ of obedience. But do you not fall into the same error when the argument has respect to the Sabbath? We can see no more fitness in applying the law of the Sabbath to the first day of the week, than in applying the law of circumcision to the subjects of baptism. For the law of circumcision was not more expressly confined to the fleshly seed of Abraham, than was the law of the Sabbath to the seventh day of the week. The true principle is, that every institution is to be explained and regulated by its own law. Therefore, if the first day of the week is an institution binding upon us, the law to regulate its observance should be looked for where we find the institution. Be pleased, brethren, to review this argument, and see if you are not treading on Pedobaptist ground.