This is how we know that we love the children of God: by loving God and carrying out his commands.
NIV
By this we come to know (recognize and understand) that we love the children of God: when we love God and obey His commands (orders, charges)--[when we keep His ordinances and are mindful of His precepts and His teaching].
AMP
By this we know that we love the children of God, when we love God, and keep his commandments.
KJV
