Tertullian tells his brethren in plain language that they kept no sabbaths, but did keep many heathen festivals. If the Sunday festival, which was a day of “indulgence” to the flesh, and which he here mentions as the “eighth day,” was kept by them as the Christian Sabbath in place of the ancient seventh day, then he would not have asserted that to us “sabbaths are strange.” But Tertullian has precisely the same Sabbath as Justin Martyr. He does not keep the first day in place of the seventh, but he keeps a “perpetual sabbath,” in which he professes to refrain from sin every day, and actually abstains from labor on none. Thus, after saying that the Jews teach that “from the beginning God sanctified the seventh day” and therefore observe that day, he says:— “Whence we [Christians] understand that we still more ought to observe a Sabbath from all ‘servile work’ always, and not only every seventh day, but through all time.”[631] Tertullian certainly had no idea that Sunday was the Sabbath in any other sense than were all the seven days of the week. We shall find a decisive confirmation of this when we come to quote Tertullian respecting the origin of the Sabbath. We shall also find that Clement expressly makes Sunday a day of labor. Several of the early fathers wrote in opposition to the observance of the seventh day. We now give the reasons assigned by each for that opposition. The writer called Barnabas did not keep the seventh day, not because it was a ceremonial ordinance unworthy of being observed by a Christian, but because it was so pure an institution that even Christians cannot truly sanctify it till they are made immortal. Here are his words:—