By scripture themselves. Here is a quick answer for your question from Catholic answers.
Let's look at your quote:
Point out that the context of 2 Timothy 3:16–17 is Paul laying down a guideline for Timothy to make use of Scripture and tradition in his ministry as a bishop.[/quote]
2 Timothy 3:16 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 perfect, throughly furnished unto all good works.
First, Timothy is the pastor of the church at Ephesus.
Secondly, one must keep in mind that this is "a pastoral epistle," which is written to give direction to keep order in the churches.
Third, vs. 16 is Paul's teaching on the inspiration of the Scriptures.
Fourth, vs. 17 is the purpose for using the Scripture as one's guide.
Fifth, and most importantly of all, Paul has said nothing about tradition, something you have inserted into this passage with no authority whatsoever.
Paul says, "But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned them; and that from a child thou hast known the holy scriptures, which are able to make thee wise unto salvation through faith which is in Christ Jesus.
Now you have skipped up to verse 15 without letting the reader know.
All Scripture is given by inspiration of God (Greek: theopneustos = "God-breathed"), and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, thoroughly furnished unto all good works" (2 Tim. 3:14–17). In verse 14, Timothy is initially exhorted to hold to the oral teachings—the traditions—that he received from the apostle Paul.
The interpretation here is false.
2 Timothy 3:14 But continue thou in the things which thou hast learned and hast been assured of, knowing of whom thou hast learned
them;
--From verse 13 to the end of the chapter not one word is said about tradition. You are inserting tradition where there is none--very deceitful. The entire context revolves around Scripture--a strong case for sola scriptura. What did Eunice and Lois teach Timothy? The Word of God,
not tradition! They drilled into him from a very early age the Word of God, the OT Scriptures, the Torah, the Law, etc. Those are things that he was assured of.
This echoes Paul’s reminder of the value of oral tradition in 1:13–14, "Follow the pattern of the sound words which you haveheard from me, in the faith and love which are in Christ Jesus; guard the truth that has been entrusted to you by the Holy Spirit who dwells within us" (RSV), and ". . . what you have heard from me before many witnesses entrust to faithful men who will be able to teach others also" (2:2).
Not one word of tradition is said. You pervert the Word of God. Timothy was taught the Word of God and taught others the Word of God--sola scriptura. Sound words come from the Word of God, not from men. Faith comes from hearing and hearing from the Word of God (Romans 10:17). "The faith and love which are in Christ Jesus." Jesus Christ is revealed through the Word of God. Christ, also, is known as "the Word."
Here Paul refers exclusively to oral teaching and reminds Timothy to follow that as the "pattern" for his own teaching (1:13). Only after this is Scripture mentioned as "profitable" for Timothy’s ministry.
Paul has referred to nothing but the Word of God.
2 Timothy 1:13 Hold fast the form of sound words, which thou hast heard of me, in faith and love which is in Christ Jesus.
Sound words are the Word of God, not tradition.
Paul has referred to nothing but the Word of God.
Paul taught Timothy the Word of God whether orally, or otherwise. He preached the Word of God, never tradition. Study the Book of Acts. Paul never taught, preached, anything other than the Word of God.
The references here made to tradition are all bogus and deceitful. You should be ashamed for even posting such material.