2 John

Second John is the shortest book in the Bible, a brief letter written by "the elder" (John) to an unnamed "elect lady and her children" (likely a local church or a Christian woman and her family). The letter emphasizes the importance of walking in truth and love, reinforcing the central themes of 1 John. The key warning is against false teachers who deny the true incarnation of Jesus Christ (that he came in the flesh). John sternly warns the recipient not to show hospitality or support to these deceivers, urging believers to protect themselves and their communities by upholding correct Christian doctrine and rejecting those who seek to undermine the truth of the Gospel.