He that has my commandments, and keeps them, he it is that loves me: and he that loves me shall be loved of my Father, and I will love him, and will manifest myself to him.
All Commentaries on John 14:21 Go To John 14
Cyril of Alexandria
AD 444
Our Saviour here says that the revelation of the mystery in us will then be clearest when we see ourselves living in conformity with His likeness. For as I live, He says, ye shall live also; the mind of each being fulfilled as it were not with what he has heard and believed merely, but rather with what he actually enjoys, when he has reached the completion of the promise. For experience is more powerful than language in ability to convince and satisfy. That we may not think that all without distinction are endowed with the power to partake of so holy a blessing, even though they be not good men and illuminated by the fear of God, He has added at once to His speech the qualification, "they that love Me;" clearly showing thereby that no others will be allowed to choose so incomparable a grace, but those who have chosen to live most righteously: for they would be "those that love Him." For even if it be the fact that Christ raises the bodies of all men, for there will be a resurrection of the evil and the good alike, yet not to all without distinction will a new life of glory and felicity be given. For it is clear that some only rise again to punishment, and will have a life more grievous than any death, while others spending ages of blessedness, will actually live the desirable and holy life in Christ. For that they who are doomed to receive the sentence of punishment from Christ on the occasion of the judgment, will abide without a taste of the blessed life, although they shared with the Saints the lot of resurrection, He makes plain by these words: He that believeth on the Son hath eternal life, but he that obeyeth not the Son shall not see life, but the wrath of God shall abide on Him. For know that although while all the evil and the good alike await the resurrection, He says that those who are fast bound by the charge of disobedience cannot even attain to a glimpse of the life, as He declares that it is not the mere act of resurrection that is life, but that that life rather consists in rest and glory and felicity, spiritual of course and of no other kind. A spiritual kind of felicity is meant, the perfect knowledge of God and the complete revelation of the mysteries of Christ, not as in a glass and in riddles, even as now showing the characters of the object of our quest dimly, but shining out to us and glistening in perfect purity and making our knowledge quite complete. For that which is in part shall be done away, as Paul says.
Our Lord Jesus Christ then, when He teaches us that to those who choose to love Him and to those who do His commandments is the promise of His revelation given, and to them it is more appropriate and pertinent, and not to those who are otherwise minded and who do the contrary, has conveyed this useful lesson in the words: He that hath My commandments and keepeth them, he it is that loveth Me. And a man has His commands when he has received the faith, and, laying it to heart, has let into his inmost soul the unpolluted and unmistakeable teaching of the Gospel commandments. And he fulfils them by carrying them out into actuality, and by making haste to distinguish himself by the light of his actions. Such a man then is perfect and wholly wedded to righteousness, a shining light by his faith and conduct, who has witness borne him of his holiness after the pattern of Christ. For At the mouth of two or three witnesses shall every word be established, according to the Scripture. A man of this sort again, God the Father will surely love, and no less also the Son will love him. For as He is of the same Substance, so also has He the same Will as His Father. For as the Substance is one the Will also is one, and there is one purpose over all, and there is no discord severing Their Wills in twain. For to those who are thought worthy of the Divine love He promises that He will give a glorious reward and that He will crown them with exceeding great blessings. For I will manifest Myself unto him, He says. For to the pure in heart the mystery of the Godhead will be clearly revealed, and Christ gives them light, illuminating the path of every duty by His Spirit, and unveiling Himself and making Himself visible as it were by the ineffable torchlight of the soul. And those who have made their choice once for all are blessed and worthy of all admiration. And methinks the prophet David was a man after this sort when he says, I will hear what the Lord God will say in me. And so is also the Divine Apostle when he exhorts us, saying, If ye seek a proof of Christ that speaketh in me; for He speaks of things concerning Himself in His Saints by His Spirit; yea, reveals other mysteries besides. Therefore it is true that knowing these things well, the Saints sometimes say, Unto us God revealed them through the Spirit; sometimes, But we have the mind of Christ, meaning by His mind His Spirit.