on Infant Baptism

Cyprian of Carthage Epistle 58 par 2 [200-270 AD]
"As to what pertains to the case of infants: You [Fidus] said that they ought not to be baptized within the second or third day after their birth, that the old law of circumcision must be taken into consideration, and that you did not think that one should be baptized and sanctified within the eighth day after his birth. In our council it seemed to us far otherwise. No one agreed to the course which you thought should be taken. Rather, we all judge that the mercy and grace of God ought to be denied to no man born"
Cyprian of Carthage Epistle 58 par 3 [200-270 AD]
"If, in the case of the worst sinners and those who formerly sinned much against God, when afterwards they believe, the remission of their sins is granted and no one is held back from baptism and grace, how much more, then, should an infant not be held back, who, having but recently been born, has done no sin, except that, born of the flesh according to Adam, he has contracted the contagion of that old death from his first being born. For this very reason does he [an infant] approach more easily to receive the remission of sins: because the sins forgiven him are not his own but those of another"
Cyprian of Carthage epistle 58.4 (200-270 ad)
For in respect of the observance of the eighth day in the Jewish circumcision of the flesh, a sacrament was given beforehand in shadow and in usage; but when Christ came, it was fulfilled in truth.
Cyprian of Carthage epistle 58.6 (200-270 ad)
And therefore, dearest brother, this was our opinion in council, that by us no one ought to he hindered from baptism and from the grace of God, who is merciful and kind and loving to all. Which, since it is to he observed and maintained in respect of all, we think is to be even more observed in respect of infants and newly-born persons, who on this very account deserve more from our help and from the divine mercy, that immediately, on the very beginning of their birth, lamenting and weeping, they do nothing else but entreat. We bid you, dearest brother, ever heartily farewell.