Please provide proof of one doctrine, dogma, discipline, or anything that comes from the early Christian church not found in the Bible. Prove that it comes from the early church. The only two documents from the first century are the Didache and 1st Clement, I THINK, so it would probably have to be in them. Unless someone knows of some other proof or early document. PROVE that things not found in the Bible come from the early church.
Basil, The Holy Spirit 67 (c. A.D. 370):
“The day would fail me, if I went through the mysteries of the Church which are not in Scripture. I pass by the others, the very confession of faith, in Father, Son, and Holy Ghost, from what written document have we?”
…"Of the dogmas and kerygmas preserved in the Church, some we posses from written teaching and others we received from the Tradition of the Apostles, handed on to us in mystery. In respect to piety both are of the same force. No one will contradict any of these, no one, at any rate, who is even moderately versed in matters ecclesiastical. Indeed, were we to try to reject unwritten customs as having no great authority, we would unwittingly injure the Gospel in its vitals; or rather, we would reduce kerygma to a mere term. For instance, to take the first and most general example, who taught us in writing to sign with the sign of the cross those who have trusted in the name of our Lord Jesus Christ? What writing has taught us to turn to the East in prayer? Which of the saints left us in writing the words of the epiclesis at the consecration of the Bread of the Eucharist and of the Cup of Benediction? For we are not content with those words the Apostle or the Gospel has recorded, but we say other things also, both before and after; and we regard these other words, which we have received from unwritten teaching, as being of great importance to the mystery.
…Where is it written that we are to bless the baptismal water, the oil of anointing, and even the one who is being baptized? Is it not from the silent and mystical tradition? Indeed, in what written word is even the anointing oil taught? Where does it say that in baptizing there is to be a triple immersion? And the rest of the things done at baptism – where is it written that we are to renounce Satan and his angels? Does this not come from that secret and arcane teaching which our Fathers guarded in a silence not too curiously meddled with and not idly investigated, when they had learned well that reverence for the mysteries is best preserved by silence… In the same way the Apostles and Fathers who, in the beginning, prescribed the Church’s rites, guarded in secrecy and silence the dignity of the mysteries; for that which is blabbed at random and in the public ear is no mystery at all. This is the reason for our handing on of unwritten precepts and practices; that the knowledge of our dogmas may not be neglected and held in contempt by the multitude through too great a familiarity. Dogma and kerygma are two distinct things. Dogma is observed in silence; kerygma is proclaimed to all the world"