Oecumenius

Whom having not seen, you love. Though now you do not see Him, yet believing, you rejoice with joy, inexpressible and full of glory, Moreover, he adds another thing that attracts to the endurance of afflictions. What is that? "whom having not seen, you love." For if, when you do not see him with bodily eyes, you love him solely by hearing, he says, consider how great a love you will show when you see him, and that when he is manifested in glory: for if his passion has so attracted you, how much will his manifestation affect you with …

Commentary on 1 Peter ↗

Irenaeus

And Paul declares: "Not that I have already attained, or that I am justified, or already have been made perfect. For we know in part, and we prophesy in part; but when that which is perfect has come, the things which are in part shall be done away." As, therefore, when that which is perfect is come, we shall not see another Father, but Him whom we now desire to see (for "blessed are the pure in heart: for they shall see God"); neither shall we look for another Christ and Son of God, but Him who [was born] of the Virgin Mary, who also …

Against Heresies Book IV ↗

Polycarp of Smyrna

I have greatly rejoiced with you in our Lord Jesus Christ, because ye have followed the example of true love [as displayed by God], and have accompanied, as became you, those who were bound in chains, the fitting ornaments of saints, and which are indeed the diadems of the true elect of God and our Lord; and because the strong root of your faith, spoken of in days long gone by, endureth even until now, and bringeth forth fruit to our Lord Jesus Christ, who for our sins suffered even unto death, [but] "whom God raised from the dead, …

Epistle to the Philippians 1 ↗

Bede

Whom having not seen, you love, etc. And Paul says: Eye has not seen, nor ear heard, nor has it entered into the heart of man, what things God has prepared for those who love Him (I Cor. II).

Commentary on the Catholic Epistles ↗