Upon what was said, he reduces all men each to their own family and father, concluding it manifest whither they belonged; i.e. he shows, upon the grounds before expressed, who do not belong to God and his family, leaving it thence to be collected, since two fathers and families divide the world, to which they must be reckoned; i.e. they belong not to God, and consequently to that worst of fathers, who first, in the general, do not righteousness; the devil being the first sinner, they are his descendants; and who next, particularly, love not their brethren, which most expressly demonstrates a diabolical nature.
Related Commentaries of 1 John 3:10
1 John 3:10
10 In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother.