If anyone teaches a different doctrine, and doesn't consent to sound words, the words of our Lord Jesus Christ, and to the doctrine which is according to godliness,

 But what is meant by oppositions? The Greek word is antitheseis ( G477) . Very much later than this there was a heretic called Marcion who produced a book called The Antitheseis in which he quoted Old Testament texts and set beside them New Testament texts which contradicted them. This might very well mean: "Don't waste your time seeking out contradictions in Scripture. Use the Scriptures to live by and not to argue about." But there are two meanings more probable than that. 