Love the Brethren

Anthony Burgess, Spiritual Refining: The Anatomy of True and False Conversion, Vol. 1, p. 42:

The second proposition is, that Love of the Brethren is that sign and mark whereby we know assuredly, that we are in this happy estate; so that our love is no merit or cause, but a sign only; hence it is good to observe, that this very self-same privilege of passing from death to live, is attributed to faith, John 5:24, but in a different sense to faith, as that instrumental cause, which puts into such a condition, to love as an effect or sign only; for though love unites us to Christ as well as faith, yet faith does it by inward receiving of Christ to us, love by going out in our works for him; Hence the union by love is posterior to that of faith; Hence also it is that if love should justify, the dignity of it would arise from the act of love, because it's union consists in doing something out of us, but in faith's union, the dignity is wholly from the object, viz. Christ embraced, because this union is by inward reception and application.

That love of the brethren is a sign of true grace.

As the Apostle makes it here a sign to ourselves, so in other places to others, Hereby shall all men know ye are my disciples, if ye love one another; he does not say, if you work miracles, if you cast out devils, but if you love. Hence the Apostle Peter in 2 Peter. 1:7 bids them add to godliness, brotherly kindness. As if we could not have any true comfort from all our religious duties towards God, unless this also be added to it, or with it.