By this we know that we love the children of God, when we love God, and keep his commandments.
These things I command you, that you love one another.
And hereby we do know that we know him, if we keep his commandments.
But whoever keeps his word, in him truly is the love of God perfected: hereby know we that we are in him.
We know that we have passed from death to life, because we love the brothers. He that loves not his brother stays in death.
And this commandment have we from him, That he who loves God love his brother also.