John 14:15

Having determined and expressly declared that the enjoyment of the heavenly blessings (supplied, that is, through him by the Father) is both due to those who love him and in very truth shall be theirs, he immediately goes on to describe the power of love. He provides excellent and irreproachable instruction to us for our profit with the intent that we should devote ourselves to its pursuit. For even if a person says that he loves God, he will not immediately merit credit for having true love of God, since the power of virtue does not stand on bare speech alone, nor piety on naked words. Rather, it is distinguished by performance of good deeds and an obedient disposition. Keeping the divine commandments is the best way to give living expression to our love toward God. It presents the picture of a life lived in all its fullness and truth. It is not a life sketched out in mere sounds that flow from the tongue. It gleams instead with the altogether radiant and brilliant colors that paint a portrait of good works.

We need everywhere works and actions, not a mere show of words. For to say and to promise is easy for any one, but to act is not equally easy. Why have I made these remarks? Because there are many at this time who say that they fear and love God, but in their works show the contrary; but God requireth that love which is shown by works. Wherefore He said to the disciples, "If ye love Me, keep My commandments." For after He had told them, "Whatsoever ye shall ask, I will do it," that they might not deem the mere "asking" to be availing, He added, "If ye love Me," "then," He saith, "I will do it." And since it was likely that they would be troubled when they heard that, "I go to the Father," He telleth them "to be troubled now is not to love, to love is to obey My words. I have given you a commandment that ye love one another, that ye do so to each other as I have done to you; this is love, to obey these My words, and to yield to Him who is the object of your love."

But when John the Baptist said, "For God giveth not the Spirit by measure," he was speaking exclusively of the Son of God, who received not the Spirit by measure; for in Him dwelleth all the fullness of the Godhead. And no more is it independently of the grace of the Holy Spirit that the Mediator between God and men is the man Christ Jesus: for with His own lips He tells us that the prophetical utterance had been fulfilled in Himself: "The Spirit of the Lord is upon me; because He hath anointed me, and hath sent me to preach the gospel to the poor." For His being the Only-begotten, the equal of the Father, is not of grace, but of nature; but the assumption of human nature into the personal unity of the Only-begotten is not of nature, but of grace, as the Gospel acknowledges itself when it says, "And the child grew, and waxed strong, being filled with wisdom, and the grace of God was in Him." But to others He is given by measure,-a measure ever enlarging until each has received his full complement up to the limits of his own perfection. As we are also reminded by the apostle, "Not to think of ourselves more highly than we ought to think, but to think soberly; according as God hath dealt to every man the measure of faith." Nor is it the Spirit Himself that is divided, but the gifts bestowed by the Spirit: for there are diversities of gifts, but the same Spirit.