And this commandment have we from him, That he who loveth God love his brother also. This commandment have we - We should love one another, and love our neighbor as ourselves. The love of God and the love of man can never be separated; he who loves God will love his brother; he who loves his brother gives this proof that he loves God, because he loves with a measure of that love which, in its infinitude, dwells in God.
Commentary on the Bible, by Adam Clarke [1831].