"The command of circumcision, again, bidding [them] always circumcise the children on the eighth day, was a type of the true circumcision, by which we are circumcised from deceit and iniquity through Him who rose from the dead on the first day after the Sabbath [namely, through], our Lord Jesus Christ. For the first day after the Sabbath, remaining the first of all the days, is called, however, the eighth, according to the number of all the days of the cycle, and [yet] remains the first." Sunday-keeping must be closely related to infant baptism, inasmuch as one of the chief arguments in modern times for the baptism of infants is drawn from the fact that God commanded the Hebrews to circumcise their male children; and Justin found his scriptural authority for first-day observance in the fact that this rite was to be performed when the child was eight days old! Yet this eighth day did not come on one day of the week, only, but on every day, and when it came on the seventh day it furnished Justin with an argument against the sacredness of the Sabbath! But let it come on what day of the week it might (and it came on all alike), it was an argument for Sunday! O wonderful _eighth_ day, that can thrive on that which is positively fatal to the seventh, and that can come every week on the first day thereof, though there be only seven days in each week! In chapters xliii., and xlvi., and xcii., Justin reiterates the assertion that those who lived in the patriarchal age did not hallow the Sabbath. But as he adds no new thought to what has been already quoted from him, these need not be copied. But in chapter xlvii., we have something of interest. Trypho asks Justin whether those who believe in Christ, and obey him, but who wish to "observe these [institutions] will be saved?" Justin answers: "In my opinion, Trypho, such an one will be saved, if he does not strive in every way to persuade other men ... to observe the same things as himself, telling them that they will not be saved unless they do so." Trypho replied, "Why then have you said, 'In my opinion, such an one will be saved,' unless there are some who affirm that such will not be saved?" In reply, Justin tells Trypho that there were those who would have no intercourse with, nor even extend hospitality to, such Christians as observed the law. And for himself he says:--