He that says he is in the light, and hates his brother, is in darkness even until now.
All Commentaries on 1 John 2:9 Go To 1 John 2
Cornelius a Lapide
AD 1637
He that saith he is in the Light (of the Gospel, Faith, and Charity) and hateth his brother, is in darkness, in ignorance of his sins, anger, hatred, lust, &c. And by these he is so blinded as not to see the great evil of hatred, how odious to God, who is the light of Charity, what destruction it causes, what torments of hell it brings with it. "He is blinded with his wickedness," says S. Chrysostom (de Erudit. discipl.): "he goes ignorantly into hell-fire, and is hurled headlong into punishments." See Exodus 11:16. And S. Cyprian (de zelo et livore) says: "If thou hast begun to be a man of light, do the things of Christ, for He is our Light and day. Why rushest thou into the darkness of anger? Why wrappest thou thyself in a mist of envy? Why dost thou extinguish with the darkness of envy every spark of peace and charity? Why dost thou go back to the devil, whom thou hast renounced? Why hast thou become like Cain? Cain? He is in the darkness of hell, because he is tending towards it." S. Basil says, "As he who has charity has God within him, so he that has hatred and anger has a devil within him," &c.; and S. Chrysostom calls anger a self-chosen (voluntarium) devil. In an angry man you may see all the furies of hell. As Seneca says (lib. ii. de Ira).
Even until now. For though baptism be an enlightenment, yet it cannot dispel the darkness of hatred, if it be voluntary, or come on after baptism. (See S. Augustine, Bede, and Hugo.)