Luther on Baptism Against the Anabaptists

"Once again.   He who does not live…the way he should, dishonours and defames both his own doctrine and his baptism.   He testifies against himself that he is not worthy of grace, and is nothing but a stain and excrement among Christians — as Peter called such [in his Second Epistle 2:18-22].  Therefore let us too seriously and diligently attempt to be found among those who taste and adorn [baptism as] this high treasure of ours — also with a life and walk toward God as well as before the world!…

"Concerning infant baptism….   Children are rightly baptized, and they too believe…. Such infant baptism devolves from the Apostles [Acts 2:14-39 & 16:15 & 16:33 & 18:8 and Romans 4:11 & 6:3f and First Corinthians 1:16 & 7:14 & 16:15 and Colossians 2:11-13]…. So we cannot reject it, and must let it remain!   For nobody has yet been able to prove that children, in baptism, cannot believe — nor that such baptisms are not right….   For wherever baptism is right and useful, it blesses the children (who believe as we do)….