15 Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves. 16 You will know them by their fruits. Do men gather grapes from thornbushes or figs from thistles? 17 Even so, every good tree bears good fruit, but a bad tree bears bad fruit. 18 A good tree cannot bear bad fruit, nor can a bad tree bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Therefore by their fruits you will know them. (Matthew 7:15–20, NKJV)
Are you sure your preacher is preaching the truth? How do you know? Jeremiah warned of prophets who “prophesy lies in my name” by speaking “the deceit of their heart” (Jer. 14:14). These two-legged wolves in sheep’s clothing continue to devour God’s flock by speaking error in the name of God. When someone speaks on behalf of God we must test what is said to be sure it is indeed from God. Our measuring stick is inspired Scripture, including what the apostles taught (Acts 17:11-12; 1 Jno. 4:1, 6). You see, it does matter what is taught and what is believed. If doctrine doesn’t matter, then why does Jesus warn us of the wolves?