And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues; They shall take up serpents; and if they drink any deadly thing, it shall not hurt them; they shall lay hands on the sick, and they shall recover.
Misinterpretation: This Scripture is often used to support the UPC doctrine that says a person must speak in tongues to be saved.
Facts: First, this is an apocryphal Scripture (see my comments on Mark 16:16). Second, if this Scripture means that all believers will speak in tongues then it also means that all believers will cast out devils, take up serpents, and heal the sick by laying hands on them. Finally, even if this Scripture is not apocryphal, there is nothing in it that says that all believers will do these things. It only lists some signs that will follow believers as a whole, not as individuals.
No one doubts that the early Church spoke in tongues, and quite a few Christians do not doubt that tongues and interpretation is still a spiritual gift that God gives out today. The problem is when people start to teach that all believers will speak in tongues, and they try to use Mark 16:17-18 to prove it.