The Second Epistle of John is a brief letter written by the apostle John to an unnamed woman and her children. John encourages them to walk in truth, love one another, and to be cautious of false teachers who deny the deity of Christ. He emphasizes the importance of abiding in the teachings of Christ and warns against providing support or hospitality to those who deviate from the truth. 2 John calls for discernment, faithfulness to the truth, and the practice of love in accordance with God's commandments.