7.  We may not receive Baptism twice or thrice; else it might be said, Though I have failed once, I shall set it right a second time:  whereas if thou fail once, the thing cannot be set right; for there is one Lord, and one faith, and one baptism Eph. iv. 5.:  for only the heretics are re-baptized This sentence is omitted in one ms. (Paris, 1824), but probably only through the repetition of the word “baptism.”  On the laws of the Church against the repetition of Baptism, and concerning the re-baptism of heretics, see Tertull. de Baptismo, c. xv:  Apost. Const. xv.:  Bingham, xii. 5:  Hefele, Councils, Lib. I. c. 2:  Dictionary Christian Antiq. I. p. 167 a., because the former was no baptism.