" Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world."
1 John 4:1
See: Notes on 1 John by Thomas L. Constable
Publisher: Constable's Bible Study Notes
See Sermon: Exclusivity: How can there be just one true religion? by Tim Keller
Publisher: Redeemer Presbyterian Church
Info from GetContent.xyz