What does 1 John 3:23 mean?
Two important commandments are given in this verse. First is the essential gospel message of belief in Christ. John 3:16 offers a similar teaching from Jesus Himself. Rather than a list of hundreds of commandments no one could adequately fulfill, Jesus said, first and foremost, we are to believe in His name. This confident trust in Jesus is not only a requirement for salvation (Ephesians 2:8–9), it is necessary for prayer to be effective (John 14:12–14).Second, John teaches the importance of Jesus' marching orders to all believers, to "love one another, just as he has commanded us." This is found in John 13:34, as well as John 15:12 and John 15:17. These are not new ideas, or something John has come to conclude after many years. This is a fundamental teaching of Christianity, something which was part of the faith from the very beginning, as shown in verse 11.