So Recently I asked the question what if there was a google in heaven – would your name come up. (Googled in heaven)
and I read this passage.
Acts 19:13-17 (NASB)
But also some of the Jewish exorcists, who went from place to place, attempted to name over those who had the evil spirits the name of the Lord Jesus, saying, “I adjure you by Jesus whom Paul preaches.” 14 Seven sons of one Sceva, a Jewish chief priest, were doing this. 15 And the evil spirit answered and said to them, “I recognize Jesus, and I know about Paul, but who are you?” 16 And the man, in whom was the evil spirit, leaped on them and subdued all of them and overpowered them, so that they fled out of that house naked and wounded. 17 This became known to all, both Jews and Greeks, who lived in Ephesus; and fear fell upon them all and the name of the Lord Jesus was being magnified.
The question was asked, “How could they drive out demons without faith?”
First we need to understand the culture ,“Exorcism was a common trade, (Matthew 12:25-27) and the best exorcists were thought to know the names of the more powerful spirits. It was also commonly believed that the Jewish priests had access to the secret name of the God of Israel and its pronunciation and thus had special power over the spirit world. So it was very natural for renegade Jewish exorcists to add Jesus’ name to their incantations.” So exorcism we done in by the power of the YHWH.
Second we know Matthew 7:21-23 “ that people either did or thought they drove out demons. “ On that day many will say to me, ‘Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?’ And then will I declare to them, ‘I never knew you; depart from me, you workers of lawlessness.’”
So to answer the question I would say maybe. Maybe at the time of Christ one could drive out demons without faith in Jesus? But only by the power of God’s name. But we do know that now those who have faith in Jesus, are known by God and have authority to cast out demons.