Clement of Alexandria — Commentary on Scripture

He says, "Perfect love casteth out fear." For the perfection of a believing man is love.

(as quoted by Cassiodorus) From the Latin Translation of Cassiodorus

For the love meant is the love of God. "And this is the love of God "says John, "that we keep His commandments; ".
"This is the love of God, that we keep His commandments."

The Instructor Book 3

1 John 5:6-8

He says, "This is He who came by water and blood;" and again -

"For there are three that bear witness, the spirit," which is life, "and the water," which is regeneration and faith, "and the blood," which is knowledge; "and these three are one." For in the Saviour are those saving virtues, and life itself exists in His own Son.

(as quoted by Cassiodorus) From the Latin Translation of Cassiodorus

1 John 5:14

"And this is the confidence which we have towards Him, that if we ask anything according to His will, He will hear us." He does not say absolutely what we shall ask, but what we ought to ask.

(as quoted by Cassiodorus) From the Latin Translation of Cassiodorus

1 John 5:16

John, too, manifestly teaches the differences of sins, in his larger Epistle, in these words: "If any man see his brother sin a sin that is not unto death, he shall ask, and he shall give him life: for these that sin not unto death," he says. For "there is a sin unto death: I do not say that one is to pray for it. All unrighteousness is sin; and there is a sin not unto death."

The Stromata Book 2

1 John 5:19

"And the whole word lies in the wicked one;" not the creation, but worldly men, and those who live according to their lusts.

(as quoted by Cassiodorus) From the Latin Translation of Cassiodorus

1 John 5:20

"And the Son of God has come and given us understanding," which comes to us, that is, by faith, and is also called the Holy Spirit.

(as quoted by Cassiodorus) From the Latin Translation of Cassiodorus