3 We know that we have come to know him if we obey his commands. 4 The man who says, “I know him,” but does not do what he commands is a liar, and the truth is not in him. 5 But if anyone obeys his word, God’s love is truly made complete in him. This is how we know we are in him: 6 Whoever claims to live in him must walk as Jesus did.
Anybody can call himself a Christian, but real Christians obey God’s commands. That makes them easy to spot most times. Are you shocked by verse 4? It’s pretty strong. It calls you a liar if you say you know God, but your actions prove otherwise. In his gospel record John records Jesus’ words: “If anyone loves me, he will obey my teaching. My Father will love him, and we will come to him and make our home with him. He who does not love me will not obey my teaching.” That’s pretty clear, isn’t it?