The Apostle John gives here three of several proofs that you may know that you are saved. The first proof is the reciprocal indwelling of Jesus’ abiding in you and your indwelling in Him. “By this we know that we abide in Him and He in us, because He has given us of His Spirit.” The second proof is of John’s face to face living experience of living with Jesus during His three years of earthly ministry. “We have seen and testify that the Father has sent the Son to be the Savior of the world.” The third proof is your own testimony. “Whoever confesses that Jesus is the Son of God, God abides in him, and he in God” (1 Joh 4:13-15).