John 17:14

When having become virtuous we are persecuted by the wicked, or when being desirous of virtue we are mocked at by them, let us not be distracted or angry. For this is the natural course of things, and everywhere virtue is wont to engender hatred from wicked men. For envying those who desire to live properly, and thinking to prepare an excuse for themselves if they can overthrow the credit of others, they hate them as having pursuits opposite to their own, and use every means to shame their way of life. But let not us grieve, for this is a mark of virtue. Wherefore Christ also saith, "If ye were of the world, the world would love its own." And in another place again, "Woe unto you when all men shall speak well of you." Wherefore also He saith here, "I have given them Thy word, and the world hath hated them." Again He telleth the reason for which they were worthy to obtain much care from the Father; "For Thy sake," He saith, "they have been hated, and for Thy word's sake"; so that they would be entitled to all providential care.

(Tr. cviii) They had not yet experienced these sufferings which they afterwards met with; but, after His custom, He puts the future into the past tense. Then He gives the reason why the world haled them; viz. Because they are not of the world. This was conferred upon them by regeneration; for by nature they were of the world. It was given to them that they should not be of the world, even as He was not of the world; as it follows; Even as I am not of the world. He never was of the world; for even His birth of the form of a servant He received from the Holy Ghost, from Whom they were born again.

While the Lord is still speaking to the Father, and praying for His disciples, He says: "I have given them Thy saying; and the world hath hated them." That hatred they had not yet experienced in those sufferings of their own, which afterwards overtook them; but He speaks thus in His usual way, foretelling the future in words of the past tense. And then, subjoining the reason of their being hated by the world, He says, "Because they are not of the world, even as I am not of the world." This was conferred on them by regeneration; for by generation they were of the world, as He had already said to them, "I have chosen you out of the world." It was therefore a gracious privilege bestowed upon them, that they, like Himself, should not be of the world, through the deliverance which He was giving them from the world. He, however, was never of the world; for even in respect of His servant-form He was born of that Holy Spirit of whom they were born again. For if on that account they were no more of the world, because born again of the Holy Spirit; on the same account He was never of the world, because born of the Holy Spirit.