1 John 5:2

New English Translation

By this we know that we love the children of God: whenever we love God and obey his commandments.

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This I command you – to love one another.

Now by this we know that we have come to know God: if we keep his commandments.

But whoever obeys his word, truly in this person the love of God has been perfected. By this we know that we are in him.

We know that we have crossed over from death to life because we love our fellow Christians. The one who does not love remains in death.

And the commandment we have from him is this: that the one who loves God should love his fellow Christian too.