There is too much assuming and asserting going around in the religious world today and not enough proving by the Scriptures. As it has always been true, error gives no proof, neither seeks it, “for every one that does evil hates the light, neither comes to the light, lest his deeds should be reproved” (Jn. 3:20). In order to show that the need for Scripture for our every belief and practice is not just an assertion, let us look at some verses which prove this fact.
The Bible commands that when we speak in religious matters, we speak only what God has spoken. “If any man speak, let him speak as the oracles (utterances) of God” (1 Pet. 4:11). If there is not an oracle of God to back up what one says about a certain subject, then you can mark it down, that doctrine came from man, not God. The next time you hear someone preach, be like the Bereans who “searched the scriptures daily, whether those things were so” (Acts 17:11). But, too many times the listener has to search the sermon, instead of the Bible, for Scripture. Jokes and stories and Lexicons and commentary based sermons are not the oracles of God. Paul said, “Preach the Word” (2 Tim. 4:2).
In order to be pleasing to God, one must have faith, for “without faith it is impossible to please him” (Heb. 11:6). Where does one get this faith? “So then faith comes by hearing, and hearing by the word of God” (Rom. 10: 17). One cannot be said to have faith if he does not possess the “spirit of faith” as spoken of by Paul in 2 Corinthians 4:13. “We having the same spirit of faith, according as it is written, I believed, and therefore have I spoken; we also believe, and therefore speak.” If we speak something in religion, then we must prove it by the word of God. Otherwise, it is a faithless, displeasing to God, doctrine.
Not only must we prove our doctrines by the Bible, but we must have authority (Bible) for what we practice. Jesus told the Devil “that man shall not live by bread alone, but by every word of God” (Lk. 4:4). The apostle John taught the same thing when he said, “Whosoever transgresses and abides not in the doctrine of Christ, has not God. He that abides in the doctrine of Christ, he has both the Father and the Son” (2 Jn. 9). If we live by, or abide in, something which is not found in Scripture, then we don’t have God. If we do something in religion, then we must prove it by the word of God. Otherwise, it is a faithless, displeasing to God, act.
The Bible also commands us to follow the example of those who taught and practiced only what God said. “Those things, which ye have both learned, and received, and heard, and seen in me, do” (Phil. 4:9). What do we see that Paul did? “And Paul . . . reasoned with them out of the Scriptures” (Acts 17:2). He didn’t just assert that Jesus was the Christ, he proved it to the Jews with Scripture. Apollos did the same by “shewing by the scriptures that Jesus was Christ” (Acts 18:28). Let us “follow” their example (1 Cor. 11:1).
“All scripture is given by the inspiration of God 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. 3:16-17). Any thing that we would ever need to believe or do to be pleasing to God can be found in the Bible. Be sure that you can “Show by the scriptures” everything that you believe, teach, and do. If you are following God, the bible is the only source you need to prove your faith.