Contradiction with James 2:19
While Acts 19:15 shows a demon recognizing Jesus' authority, James 2:19 emphasizes that belief alone, even by demons, is not virtuous without action.
James 2:19: Thou believest that there is one God; thou doest well: the devils also believe, and tremble.
Contradiction with John 12:42-43
Acts 19:15 highlights the demon's acknowledgment of Jesus, yet in John 12:42-43, even some among the leaders believed in Him but would not openly acknowledge Him due to fear of the Pharisees.
John 12:42-43: Nevertheless among the chief rulers also many believed on him; but because of the Pharisees they did not confess [him], lest they should be put out of the synagogue:
Contradiction with Matthew 7:21-23
Acts 19:15 presents a demon recognizing Jesus and Paul, but Matthew 7:21-23 warns that merely acknowledging Christ does not ensure salvation without doing God's will.
Matthew 7:21-23: Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven.
Contradiction with Mark 1:34
Acts 19:15 shows a demon speaking about Jesus, however, Mark 1:34 shows that Jesus did not allow the demons to speak, as they knew Him.
Mark 1:34: And he healed many that were sick of divers diseases, and cast out many devils; and suffered not the devils to speak, because they knew him. [to speak...: or, to say that they knew him]
Contradiction with Acts 16:17
Acts 19:15 involves a demon acknowledging specific people, whereas in Acts 16:17, a spirit acknowledges God's servants repeatedly and openly over time, indicating different actions by spirits.
Acts 16:17: The same followed Paul and us, and cried, saying, These men are the servants of the most high God, which shew unto us the way of salvation.
Paradox #1
The Bible verse in question highlights a situation where evil spirits recognized Jesus and Paul, but not others trying to use their names. A potential contradiction arises when considering the power of using Jesus' name. The Bible teaches that believers have authority in Jesus' name, yet here, it appears ineffective for those who don't truly believe or have a relationship with Him. This could lead to confusion about the consistency of spiritual authority and the importance of genuine faith.