John Calvin on 1 John 3:10

10 In this the children of God are manifest. He shortly draws this conclusion, that those in vain claim a place and a name among the children of God, who do not prove themselves to be such by a pious and holy life, since by this evidence they shew that they differ from the children of the devil. But he does not mean that they are thus manifested, so as to be openly recognized by the whole world; but his meaning is only this, that the fruit and adoption always appear in the life.

1 John 3:10-13

10. — Whosoever doeth not righteousness is not of God, neither he that loveth not his brother.

10. — Quisquis non facit justitiam, non est ex Deo, et qui non diligit fratrem suum.

11. For this is the message that ye heard from the beginning, that we should love one another.

11. Quia haec est praedicatio quam audistis ab initio, ut mutuo nos diligamus.

12. Not as Cain, who was of that wicked one, and slew his brother. And wherefore slew he him? Because his own works were evil, and his brother’s righteous.

12. Non sicut Cain, qui ex maligno erat, occidit fratrem suum; et qua de causa eum occidit? Quia opera ejus mala erant, fratris autem justa.

13. Marvel not, my brethren, if the world hate you.

13. Ne miremini, fratres mei, si vos mundus odit.