458. These illustrations make plain the origin and nature of the link between love to God and love towards the neighbour; the love of God towards mankind flows in, and it is its reception by the person and his co-operation which are love towards the neighbour. In short, it is linking, as expressed in this saying of the Lord's:

On that day you will know that I am in my Father, and you are in me, and I in you, John 14:20.

And as this saying puts it:

He who has my commandments and keeps them, he it is who loves me; and I shall love him, and show myself to him, and I shall make my dwelling with him, John 14:21-23.

All the Lord's commandments have to do with love towards the neighbour, and they are, in short, not to do evil to him, but to do him good. These people love God and God loves them, as stated by the Lord's words just quoted. It is because those two loves are so linked that John says:

He who keeps the commandments of Jesus Christ remains in Him, and He in him. If anyone says, 'I utterly love God,' but hates his brother, he is a liar. For if someone does not love his brother whom he can see, how can he love God whom he cannot see? We have this commandment from Him, that if anyone loves God, he should also love his brother. 1 John 3:24; 4:20-21.