In 2 Timothy 3:14-15 we see that God’s Word is sufficient to save. Paul writes “But continue in what you have learned and have firmly believed, knowing from whom you learned it and how from childhood you have been acquainted with the sacred writings, which are able (sufficient) to make you wise for salvation through faith in Christ Jesus.”
Timothy is described as having “learned” the word, “firmly believed” the word, because he was taught the word at a young age he is described as being “acquainted with” the word. What is the result? What is the word able to do? The word is able to “make you wise for salvation.” The word works.
A protestant Bible believing preacher was having a conversation with a Roman Catholic scholar. They were talking about how the Bible came together. The Roman Catholic scholar said, “We all know that the church created the Bible”- he said this to emphasize that the Bible was a human, not divine, book. The protestant pastor replied, “That’s ridiculous. The church never created the Bible. The Bible created the church.”
It did. It does. God’s Word is sufficient and able to build the church. If Jesus said “I am going to build my church,” how do you think he’s going to do it? He’s going to do it the way he’s always done it: by speaking. He spoke creation into existence, he speaks to bring dead souls to live, and his speaking calls the church into existence. The Scriptures are totally sufficient, and so we preach them.