John Calvin on 1 Corinthians 6:8

8. But ye do injury. Hence we see for what reason he has inveighed against them with so much bitterness — because there prevailed among them such a base desire of gain, that they did not even refrain from injuring one another. He premised a little before, with the view of exposing the magnitude of the evil, that those are not Christians who know not to endure injuries. There is, then, an amplification here, founded on a comparison: for if it is wrong not to bear injuries patiently, how much worse is it to inflict them?

And that your brethren Here is another aggravation of the evil; for if those are doubly culpable who defraud strangers, it is monstrous for brother to be cheated or despoiled by brother Now all of us are brethren that call upon one Father in heaven (Matthew 23:9.) At the same time, if any one acts an unprincipled part towards strangers, Paul does not palliate the crime; but he teaches that the Corinthians were utterly blinded in making sacred brotherhood a matter of no moment.

1 Corinthians 6:9-11

9. Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind,

9. An nescitis, quod iniusti regenum Dei hereditate non obtinebunt? Ne erretis, neque scortatores, neque idololatrae, neque moechi, neque molles, neque paederastse.

10. Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortioners, shall inherit the kingdom of God.

10. Neque fures, neque avari, neque ebriosi, neque maledici, neque rapaces regnum Dei hereditate obtinebunt.

11. And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God.

11. Et haec fuistis, “Et telles choses auez-vous este,” ou “este aucuns;” — “And such things were you,” or “were some of you.” sed abluti estis, sed sanctificati estis, sed iustificati estis in nomine Domini Jesu, et in Spiritu Dei nostri.