Mark 11:22

(non occ.) The wonder of the disciples was the consequence of imperfect faith, for this was no great thing for God to do; since then they did not clearly know His power, their ignorance made them break out into wonder; and therefore it is added, And Jesus answering saith unto them, Have faith in God. For verily I say unto you, That whosoever shall say unto this mountain, &c. That is; Thou shalt not only be able to dry up a tree, but also to change a mountain by thy command and order.

And Jesus answering said to them: Have faith in God. Amen, I say to you, that whoever says to this mountain: Be lifted up and cast into the sea, and does not doubt in his heart, but believes that what he says will come to pass, it will be done for him. Those gentiles who wrote curses against the Church usually reproach our people for not having complete faith in God, because they have never been able to move mountains. To which it must be replied that not everything that has happened in the Church is written, just as our Scripture testifies about the deeds of Christ Himself, our God and Lord. Therefore, it could also have happened that the mountain was removed from the earth and cast into the sea, if necessity required it. As we read about what was done by the prayers of the blessed father Gregory of Neocaesarea, bishop of Pontus, a man distinguished by merits and virtues, that a mountain yielded ground to the extent that the inhabitants of the city needed. For when he wanted to build a church in a suitable place, he saw that it was narrower than required because on one side it was confined by a sea cliff and on the other by a nearby mountain. He came to the place at night, and on his knees admonished the Lord of His promise, to move the mountain further away according to the faith of the petitioner. And in the morning, he returned and found that the mountain had left as much space for the church builders as they needed. Therefore, this man or another man of the same merit could have obtained from the Lord, by the merit of faith, that even the mountain would be lifted up and cast into the sea if the opportunity demanded it. However, because the term mountain is sometimes used to signify the devil, evidently due to the pride with which he rises against God and wishes to be like the Most High, the mountain is removed from the earth and cast into the sea at the command of those strong in faith when holy teachers preaching the word drive out the unclean spirit from the hearts of those ordained to life, and he is permitted to exercise the madness of his tyranny in the turbulent and bitter minds of unbelievers. Not that he hadn't had his seat and kingdom there before, but because he rages more fiercely against those he can harm as much as he regrets having been driven out by the injury inflicted by the pious. To this is similar that passage of the Apocalypse: And the second angel sounded the trumpet, and as it were a great mountain burning with fire was cast into the sea (Rev. VIII). For when the angel sounded the trumpet, a mountain burning with fire was cast into the sea, because, when the teacher of truth preached the word, the ancient enemy, inflamed with the torches of envy, heavily corrupted the minds of the perverse to avenge his expulsion from the faithful upon the unfaithful.

(ubi sup.) The Gentiles, who have attacked the Church, are in the habit of objecting to us, that we have never had full faith in God, for we have never been able to change mountains. 1It could, however, be done, if necessity called for it, as once we read that it was done by the prayers of the blessed Father Gregory of Neocæsarea, Bishop of Pontus, by which a mountain left as much space of ground for the inhabitants of a city as they wanted.

Notice, then, how Christ here appears as God. For through the prophets the Lord says: "I dry up the green tree, and make the dry tree flourish" (Ezek. 17:24). But marvel at God's love for mankind in that even to us, who become like God through faith, He gives the wonder-working power that belongs to Him by nature, so that we can even move mountains. A mountain is, in the spiritual sense, a proud mind, lofty and obstinate. Therefore, whoever sees himself overcome by the passion of pride, striving to drive it out of himself, should seek the visitation and help of God. For he is proud who says that he does everything himself and not by the help of God. Such a person should rebuke this mountain, that is, pride, and say to it: "Be taken up and cast into the sea," that is, into worldly people who are in the sea of this life and are unbelievers, while he himself should "not doubt," that is, not fall away from God. For the proud person falls away from God, saying: I owe nothing to God and have no need of His help.

Consider the Divine mercy, how it confers on us, if we approach Him in faith, the power of miracles, which He Himself possesses by nature, so that we should be able even to change mountains.