(2) And hereby we do know that we (e) know him, (e) if we keep his commandments.
(2) He returns to the testimony of our union with God, that is, to sanctification, declaring what it is to walk in the light, that is, to keep God's commandments. By this it follows that holiness does not consist in those things which men have devised, neither in a vain profession of the gospel.
(d) This must be understood of such a knowledge as has faith with it, and not of a common knowledge.
(e) For the tree is known by the fruit.