With the facts of history before us concerning sacred time for nearly three centuries after the resurrection of Christ—facts drawn from the inspired writers of the New Testament and their immediate successors, we are prepared to consider the different theories of the Christian Sabbath. These theories may be summed up in three. Of one or another of these, all the remaining theories are simply modifications. The first of these three leading theories is as follows: “The Sabbath was a Jewish institution, and expired with the Jewish dispensation. The Lord’s day is not in any proper sense a Sabbath. It has an origin, a reason, and an obligation, not drawn from the fourth commandment, but peculiarly its own, as an institution belonging specially to the New-Testament dispensation.” The second theory, in the order in which we notice these different views, maintains that the observance of the Sabbath, as required under the Old-Testament dispensation, knows no change in any particular. The observance of the seventh day of the week is essential to the proper observance of the Sabbath under the gospel dispensation. The observance of the first day of the week is without divine warrant—a departure from the law of God through the corruptions which crept into the church. The third theory agrees with the second in maintaining that the Sabbath existed from the beginning, and that it has never been abolished or superseded. It disagrees with the second theory in maintaining that the essential idea of the law of the Sabbath is not the holiness of a portion of time, but the _consecration of a specified proportion of time_, one day in seven; that, in accordance with this, a change of day was admissible; that a change was actually made by divine warrant from the resurrection of Christ; and that the first day of the week, the Lord’s day, is the true Christian Sabbath, having its moral sanction in the fourth commandment.