From St Basil the Great's On the Holy Spirit
Of the beliefs and practices whether generally accepted or publicly enjoined which are preserved in the Church some we possess derived from written teaching; others we have received delivered to us in a mystery by the tradition of the apostles; and both of these in relation to true religion have the same force. And these no one will gainsay - no one, at all events, who is even moderately versed in the institutions of the Church. For were we to attempt to reject such customs as have no written authority, on the ground that the importance they possess is small, we should unintentionally injure the Gospel in its very vitals; or, rather, should make our public definition a mere phrase and nothing more. For instance, to take the first and most general example, who is thence who has 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 at the prayer? Which of the saints has left us in writing the words of the invocation at the displaying of the bread of the Eucharist and the cup of blessing? For we are not, as is well known, content with what the apostle or the Gospel has recorded, but both in preface and conclusion we add other words as being of great importance to the validity of the ministry, and these we derive from unwritten teaching. Moreover we bless the water of baptism and the oil of the chrism, and besides this the catechumen who is being baptized. On what written authority do we do this? Is not our authority silent and mystical tradition? Nay, by what written word is the anointing of oil itself taught? And whence comes the custom of baptizing thrice? And as to the other customs of baptism from what Scripture do we derive the renunciation of Satan and his angels? Does not this come from that unpublished and mystical teaching which our fathers guarded in a silence out of the reach of curious meddling and inquisitive investigation? Well had they learned the lesson that the awful dignity of the mysteries is best preserved by silence. What the uninitiated are not even allowed to look at was hardly likely to be publicly paraded about in written documents. What was the meaning of the mighty Moses in not making all the parts of the tabernacle open to every one? The profane he stationed without the sacred barriers; the first courts he conceded to the purer; the Levites alone he judged worthy of being servants of the Deity; sacrifices and burnt offerings and the rest of the priestly functions he allotted to the priests; one chosen out of all he admitted to the shrine, and even this one not always but on only one day in the year, and of this one day a time was fixed for his entry so that he might gaze on the Holy of Holies amazed at the strangeness and novelty of the sight. Moses was wise enough to know that contempt stretches to the trite and to the obvious, while a keen interest is naturally associated with the unusual and the unfamiliar. In the same manner the Apostles and Fathers who laid down laws for the Church from the beginning thus guarded the awful dignity of the mysteries in secrecy and silence, for what is bruited abroad random among the common folk is no mystery at all. This is the reason for our tradition of unwritten precepts and practices, that the knowledge of our dogmas may not become neglected and contemned by the multitude through familiarity. Dogma and Kerugma are two distinct things; the former is observed in silence; the latter is proclaimed to all the world. One form of this silence is the obscurity employed in Scripture, which makes the meaning of dogmas difficult to be understood for the very advantage of the reader...
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Time will fail me if I attempt to recount the unwritten mysteries of the Church. Of the rest I say nothing; but of the very confession of our faith in Father, Son, and Holy Ghost, what is the written source? If it be granted that, as we are baptized, so also under the obligation to believe, we make our confession in like terms as our baptism, in accordance with the tradition of our baptism and in conformity with the principles of true religion, let our opponents grant us too the right to be as consistent in our ascription of glory as in our confession of faith. If they deprecate our doxology on the ground that it lacks written authority, let them give us the written evidence for the confession of our faith and the other matters which we have enumerated. While the unwritten traditions are so many, and their bearing on the mystery of godliness (1 Timothy 3:16) is so important, can they refuse to allow us a single word which has come down to us from the Fathers; - which we found, derived from untutored custom, abiding in unperverted churches; - a word for which the arguments are strong, and which contributes in no small degree to the completeness of the force of the mystery?
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In answer to the objection that the doxology in the form with the Spirit has no written authority, we maintain that if there is no other instance of that which is unwritten, then this must not be received. But if the greater number of our mysteries are admitted into our constitution without written authority, then, in company with the many others, let us receive this one. For I hold it apostolic to abide also by the unwritten traditions. I praise you, it is said, that you remember me in all things, and keep the ordinances as I delivered them to you; (1 Corinthians 11:2) and Hold fast the traditions which you have been taught whether by word, or our Epistle. (2 Thessalonians 2:15) One of these traditions is the practice which is now before us, which they who ordained from the beginning, rooted firmly in the churches, delivering it to their successors, and its use through long custom advances pace by pace with time.
If, as in a Court of Law, we were at a loss for documentary evidence, but were able to bring before you a large number of witnesses, would you not give your vote for our acquittal? I think so; for at the mouth of two or three witnesses shall the matter be established. (Deuteronomy 19:15) And if we could prove clearly to you that a long period of time was in our favour, should we not have seemed to you to urge with reason that this suit ought not to be brought into court against us? For ancient dogmas inspire a certain sense of awe, venerable as they are with a hoary antiquity.
I will therefore give you a list of the supporters of the word (and the time too must be taken into account in relation to what passes unquestioned). For it did not originate with us. How could it? We, in comparison with the time during which this word has been in vogue, are, to use the words of Job, but of yesterday. (Job 8:9) I myself, if I must speak of what concerns me individually, cherish this phrase as a legacy left me by my fathers. It was delivered to me by one who spent a long life in the service of God, and by him I was both baptized, and admitted to the ministry of the church....
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Sola Scriptura is simply not a patristic teaching, and stands starkly in contrast to the general heuristic of the fathers.
