"I am the way, the truth, and the life" (John 14:6), and yet there are hundreds of different Christian denominations all professing to follow the same Truth? Paul warned of this; "Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ" (Colossians 2:8) Jesus didn't start or name a denomination, and he warned of the traditions of men; "But in vain they do worship me, teaching for doctrines the commandments of men" (Matthew 15:9). We also read where Jesus found 5 of the 7 churches in Revelation to be unacceptable.
When every Tom, Dick, and Harry adds their two cents, you can end up with something new, something altered, or something false. Jesus said; "It is written... Have ye not read?...what saith the scripture?" That's our guide for differentiating the truth from a lie. "They received the word with all readiness of mind, and searched the scriptures daily, whether those things were so" (Acts 17:11). Opinions are a dime a dozen, as are Christian sects, but we have one example who was and is the Living Word. I personally prefer to put religion on a shelf and follow what he lived and taught. A true Church will teach His word (scriptures), and not create their own books, religious creed, rules, and doctrine.
"For false Christs and false prophets shall rise...But take ye heed: behold, I have foretold you all things" (Mark 13:23-24).