All I can say is that, according to Catholicism, the oral Tradition is a way that God communicates his message in addition to Holy Scripture. What I meant to say--or ought to have said--is the two are so closely connected that to separate Holy Scripture from Tradition (and on top of that, the teaching authority of the Apostolic Church) is to risk having an incomplete understanding of what Scripture teaches and what God is communicating to us. That is the Catholic view, as I understand it.
"Closely connected"? I think that's the problem.
How can we have an "incomplete understanding" of what Scripture teaches if we think that Scripture needs something else to complete it BUT that then turns around and contradict Scripture when Scripture says:
1 Timothy 3:16-17
16 All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness, 17 that the man of God may be complete, thoroughly equipped for every good work.
The question isn't, "Is Scripture complete without Holy Traditions and teaching authority of the Apostolic Church" the question becomes "can I understand the Scripture without the Holy Traditions and the teaching authority of the Apostolic Church?"
And to answer that question, we must ask ourselves another question:
How does one come to understand the Scriptures?
How does those who believe in the Holy Tradition understand Scripture accurately enough to teach it to even claim what is "Holy Tradition"?
I think you look to Scripture for the question for "How does one come to understand Scripture?
1 Corinthians 2:6-16
6 However, we speak wisdom among those who are mature, yet not the wisdom of this age, nor of the rulers of this age, who are coming to nothing. 7 But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory, 8 which none of the rulers of this age knew; for had they known, they would not have crucified the Lord of glory.
9 But as it is written:
“Eye has not seen, nor ear heard,
Nor have entered into the heart of man
The things which God has prepared for those who love Him.”
10 But God has revealed them to us through His Spirit. For the Spirit searches all things, yes, the deep things of God. 11 For what man knows the things of a man except the spirit of the man which is in him? Even so no one knows the things of God except the Spirit of God. 12 Now we have received, not the spirit of the world, but the Spirit who is from God, that we might know the things that have been freely given to us by God.
13 These things we also speak, not in words which man’s wisdom teaches but which the Holy Spirit teaches, comparing spiritual things with spiritual. 14 But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them, because they are spiritually discerned. 15 But he who is spiritual judges all things, yet he himself is rightly judged by no one. 16 For “who has known the mind of the Lord that he may instruct Him?” But we have the mind of Christ.
2 Peter 1:19-21
19 And so we have the prophetic word confirmed, which you do well to heed as a light that shines in a dark place, until the day dawns and the morning star rises in your hearts; 20 knowing this first, that no prophecy of Scripture is of any private interpretation, 21 for prophecy never came by the will of man, but holy men of God spoke as they were moved by the Holy Spirit.
1 Thes 1:2-5
2 We give thanks to God always for you all, making mention of you in our prayers, 3 remembering without ceasing your work of faith, labor of love, and patience of hope in our Lord Jesus Christ in the sight of our God and Father, 4 knowing, beloved brethren, your election by God. 5 For our gospel did not come to you in word only, but also in power, and in the Holy Spirit and in much assurance, as you know what kind of men we were among you for your sake.
The Holy Spirit!
See, when I read Scripture I know that these men spoke as they were moved by the Holy Spirit. I know that their gospel came in word and power by the Holy Spirit, so I know I can trust Scripture. And because of 2 Timothy 3:16-17, I know that by it I may be complete, thoroughly equipped for every good work.
As for anything else, I'll take what they say "in light of Scripture".
EDIT: Changed colors, I felt that the black was running into each other.