Jesus said this From Luke:9 (Also in Mark 9:40)
49 Now John answered and said, “Master, we saw someone casting out demons in Your name, and we forbade him because he does not follow with us.”
50 But Jesus said to him, “Do not forbid him, for he who is not against us is on our side.”
Churchsoldier, The difference between the man John was referring to who was casting out demons, in our Lords name, did not start his own man made church such as the Protestant churches, have.
St. John, is correct that the man was not following Jesus Christ among the Apostles in their travels. However Jesus must of personally met the man and through the Grace of God was given the gift of healing through the Church Jesus Christ established and not through any man made church, for there was no such thing as Protestantism then nor there should be none now.
The Catholic Church is the House built on Rock: Luke 6: 46And why call you me, Lord, Lord; and do not the things which I say? 47Every one that cometh to me, and heareth my words, and doth them, I will shew you to whom he is like. **48He is like to a man building a house, who digged deep, and laid the foundation upon a rock. **And when a flood came, the stream beat vehemently upon that house, and it could not shake it; for it was founded on a rock. 49But he that heareth, and doth not, is like to a man building his house upon the earth without a foundation: against which the stream beat vehemently, and immediately it fell, and the ruin of that house was great.
Matt 7: 21Not every one that saith to me, Lord, Lord, shall enter into the kingdom of heaven: but he that doth the will of my Father who is in heaven, he shall enter into the kingdom of heaven. 22Many will say to me in that day: Lord, Lord, have not we prophesied in thy name, and cast out devils in thy name, and done many miracles in thy name?
23And then will I profess unto them, I never knew you: depart from me, you that work iniquity.
ChurchSoldier, Above Matt 7: Jesus Christ states, not all who prophesied, who cast out devil in His name, or who have done miracles in His name will be saved. Only those who do the will of His Father will be saved. The Father will is that we all who call ourselves Christians must be in the One Church Jesus CHrist founded on Rock, the Catholic Church.
Jesus Christ, followed His own example above and Built His Catholic Church / house on Rock. The Protestant Church are built on sand by men beginning with Martin Luther and the man name Mike down the street, who is starting his own church, with his own interpretation of Scripture.
Since the Protestant reformation a domino effect started with man made churches and as a domino effect demonstrates they all fall down, because they are not built on Rock aka St.Peter by Jesus Christ.
Ufam Tobie