Philip Schaff (ed.) · 494 of 652
In which Augustin replies to all the several statements in the letter of Petilianus, as though disputing with an adversary face to face. · Chapter 24
Chapter 24.—56. Petilianus said: "But you will answer that you by the same declaration, ‘He that is once washed needeth not save to wash his feet.’ Now the ‘once’ is once that has authority, once that is confirmed by the truth."
57. Augustin answered: Baptism in the name of the Father and of the Son and of the has Christ for its authority, not any man, whoever he may be; and Christ is the truth, not any man.