Again, I write a new commandment to you, which is true in him and in you; because the darkness is passing away, and the true light already shines.
The new commandment "is true" in Christ and in Christians in this sense: Jesus Christ’s obedience to His Father fulfilled it first, and Christians’ obedience to God is fulfilling it now. As Christ’s disciples obey the command to love one another, this command has the character of truth. In other words, Christian love is truth manifested, both in Jesus who modeled it and in His disciples who follow His example.