This part matters because the most important thing about a church is what it believes and preaches about Jesus Christ. Paul said a church that preaches a different gospel is not to be followed even if an angel leads it: "But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed" (Galatians 1:8). Everything else comes after this.
How to find out
Most churches publish a statement of faith, often on their website. Read it. If you cannot find one, ask for it. Then listen to how the church preaches, because a statement on a website is only as good as the pulpit behind it. Like the Bereans, test what you hear by the Scriptures: "they received the word with all readiness of mind, and searched the scriptures daily, whether those things were so" (Acts 17:11).
The core
These are the things a sound church must hold. They are not one tradition's preferences; they are the faith "once delivered unto the saints" (Jude 1:3).
Scripture. The Bible is the inspired word of God and the final authority for faith and life. "All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness" (2 Timothy 3:16). The Lord prayed, "Sanctify them through thy truth: thy word is truth" (John 17:17). A church that places its own traditions, a later book or a living leader's revelations alongside Scripture, or above it, has stepped off the foundation. The Lord's rebuke to the Pharisees applies: "Howbeit in vain do they worship me, teaching for doctrines the commandments of men" (Mark 7:7). This ministry holds to the King James Bible and the Received Text; you can see where it and the modern Critical Text differ at kylelauriano.com/library/changes.
The Trinity. One God, Father, Son and Holy Ghost. The Lord sent His disciples to baptize "in the name of the Father, and of the Son, and of the Holy Ghost" (Matthew 28:19) — one name, three persons.
The deity and humanity of Christ. "In the beginning was the Word, and the Word was with God, and the Word was God" (John 1:1). John goes on: "And the Word was made flesh, and dwelt among us" (John 1:14). Paul says of Christ, "For in him dwelleth all the fulness of the Godhead bodily" (Colossians 2:9). John gives a test: "Every spirit that confesseth that Jesus Christ is come in the flesh is of God: And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God" (1 John 4:2-3). A group that denies that Jesus is God, or that He truly became man, is not a Christian church, whatever its sign says.
The cross and the resurrection. "For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures" (1 Corinthians 15:3-4). Christ's death as the sacrifice for sin, and His bodily resurrection, are the heart of the gospel.
Salvation by grace through faith. "For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: Not of works, lest any man should boast. For we are his workmanship, created in Christ Jesus unto good works" (Ephesians 2:8-10). Salvation is God's gift, received by faith, and it produces good works; it is not earned by them.
Repentance and faith. Paul summed up his preaching as "repentance toward God, and faith toward our Lord Jesus Christ" (Acts 20:21). A church that offers forgiveness without repentance has a different gospel from the apostles'.
Baptism. Peter preached, "Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost" (Acts 2:38). The Lord said, "He that believeth and is baptized shall be saved; but he that believeth not shall be damned" (Mark 16:16). Mark 16:9-20 stands in the 1611; you can see where modern versions differ at kylelauriano.com/library/changes. A sound church takes baptism seriously as the Lord's command.
The only way. "I am the way, the truth, and the life: no man cometh unto the Father, but by me" (John 14:6).
The return of Christ and the judgment. The angels told the disciples, "this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven" (Acts 1:11). And the Lord spoke plainly of the judgment: "And these shall go away into everlasting punishment: but the righteous into life eternal" (Matthew 25:46). A church that has quietly dropped hell from its preaching has stopped telling people the truth about what they are being saved from.
Where faithful churches differ
Not every question is a test of a true church. Paul told the Romans, "Him that is weak in the faith receive ye, but not to doubtful disputations" (Romans 14:1), and on some matters, "Let every man be fully persuaded in his own mind" (Romans 14:5). Sound churches differ on many things. Here are some you will meet. You should know where a church stands on them before you join, so you are not surprised later, but you should not expect every faithful church to agree with you.
How baptism is given and to whom. Here, let the texts speak. Of the Lord's own baptism Matthew writes, "And Jesus, when he was baptized, went up straightway out of the water" (Matthew 3:16). When the eunuch asked what hindered him, "Philip said, If thou believest with all thine heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God" (Acts 8:37), and "they went down both into the water, both Philip and the eunuch; and he baptized him" (Acts 8:38). Paul writes, "Therefore we are buried with him by baptism into death" (Romans 6:4). Acts also records whole households baptized: Lydia "was baptized, and her household" (Acts 16:15), and the jailer "was baptized, he and all his, straightway" (Acts 16:33). (Acts 8:37 stands in the 1611; you can see where modern versions drop it at kylelauriano.com/library/changes.)
As a matter of history, churches have practised baptism in more than one way. The Didache told believers to baptize "in living water", and, where there was not enough water, to "pour out water thrice upon the head into the name of Father and Son and Holy Spirit".9 Over the centuries some churches have baptized the infants of believers and others only those who profess faith. Ask a church what it practises and which texts it stands on, then open those texts yourself.
Church government. Some churches are led by elders, some by a pastor and deacons, some by bishops, some by the congregation. Ask how decisions are made and who leaders answer to.
Women in the gathering. Scripture says, "Let your women keep silence in the churches: for it is not permitted unto them to speak; but they are commanded to be under obedience, as also saith the law" (1 Corinthians 14:34), and "But I suffer not a woman to teach, nor to usurp authority over the man, but to be in silence" (1 Timothy 2:12). Those words should be taken as written, not set aside as "merely cultural". Churches that take them seriously still apply them differently. Ask what the church practises and why, from the text.
The gifts of the Spirit. Paul wrote, "Follow after charity, and desire spiritual gifts" (1 Corinthians 14:1), and "Quench not the Spirit. Despise not prophesyings. Prove all things; hold fast that which is good" (1 Thessalonians 5:19-21). The gifts of the Spirit and deliverance from evil spirits are for today, and guests on my show testify to both. Every gift is tested by the word of God and kept within the limits the word sets; Paul's order for them is 1 Corinthians 14, "Let all things be done decently and in order" (1 Corinthians 14:40). Churches differ here; whatever a church believes, look for both openness to the Spirit and the testing the apostle commands.
The order of the last things. Christians have long differed on how to read the prophecies of the end, including Revelation 20. A sound church will hold firmly that Christ will return bodily and judge the living and the dead; it need not share your view of the timeline.
How to weigh a difference
When you meet a difference, ask three questions. Is this about the gospel itself — who Christ is, what He did, how a sinner is saved? If so, it is a line, not a preference. Does the church hold its view from Scripture, and can it show you the texts? A church that can open its Bible and explain itself is worth listening to even where you disagree. And can you in good conscience sit under this teaching, and bring your family under it, without either fighting it every week or pretending to agree? If not, look elsewhere, kindly.
Assurance and the warnings
Scripture gives believers real assurance. The Lord said, "My sheep hear my voice, and I know them, and they follow me: And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand" (John 10:27-28). John wrote "that ye may know that ye have eternal life" (1 John 5:13). Paul was "persuaded, that neither death, nor life... nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord" (Romans 8:38-39). Scripture also gives solemn warnings: "For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, And have tasted the good word of God, and the powers of the world to come, If they shall fall away, to renew them again unto repentance" (Hebrews 6:4-6); and again, "For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins" (Hebrews 10:26); and Peter's charge to "give diligence to make your calling and election sure" (2 Peter 1:10).
Ask a church how it preaches these texts, and listen for whether it preaches both kinds honestly — giving trembling believers the comfort Christ gives, and giving careless professors the warnings Christ gives — rather than preaching one set and quietly ignoring the other.