In Romans 16:17-18, the Apostle Paul advises believers to be on guard against those who cause divisions and create obstacles contrary to the teachings they have received. He encourages them to avoid such individuals, as they do not serve Christ but rather their own appetites, using smooth talk and flattery to deceive the unsuspecting.
Here is the passage from the New International Version (NIV):
"I urge you, brothers and sisters, to watch out for those who cause divisions and put obstacles in your way that are contrary to the teaching you have learned. Keep away from them." (Romans 16:17)
"For such people are not serving our Lord Christ, but their own appetites. By smooth talk and flattery they deceive the minds of naive people." (Romans 16:18)
In summary, if someone deviates from the truth, the teaching in these verses suggests that you should be vigilant, recognize the deviation, and keep your distance from such individuals to protect your faith and that of others.