23 For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith.
[AD 407] John Chrysostom on Mark 11:19-26
(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.

(non occ.) Or else, as He did not dry up the fig tree for its own sake, but for a sign that Jerusalem should come to destruction, in order to show His power, in the same way we must also understand the promise concerning the mountain, though a removal of this sort is not impossible with God.

[AD 430] Augustine of Hippo on Mark 11:19-26
(de Con. Evan. ii. 68) The meaning is not that it dried up at the time, when they saw it, but immediately after the word of the Lord; for they saw it, not beginning to dry up, but completely dried up; and they thus understood that it had withered immediately after our Lord spoke.

[AD 735] Bede on Mark 11:19-26
(ubi sup.) Further, the fig tree was dried up from the roots to show that the nation was impious not only for a time and in part, and was to be smitten for ever, not merely to be afflicted by the attacks of nations from without and then to be freed, as had often been done; or else it was dried up from the roots, to show that it was stripped not only of the external favour of man, but altogether of the favour of heaven within it; for it lost both its life in heaven, and its country on earth.

(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.

(ubi sup.) Or else, because the devil is often on account of his pride called by the name of a mountain, this mountain, at the command of those who are strong in the faith, is taken up from the earth and cast into the sea, whenever, at the preaching of the word of God by the holy doctors, the unclean spirit is expelled from the hearts of those who are fore-ordained to life, and is allowed to exert the tyranny of his power over the troubled and embittered souls of the faithless. At which time, he rages the more fiercely, the more he grieves at being turned away from hurting the faithful. It goes on: Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.

(ubi sup.) But we must observe that there is a difference in those who pray; he who has perfect faith, which worketh by love, can by his prayer or even his command remove spiritual mountains, as Paul did with Elymas the sorcerer. But let those who are unable to mount up to such a height1 of perfection pray that their sins should be forgiven them, and they shall obtain what they pray for, provided that they themselves first forgive those who have sinned against them. If however they disdain to do this, not only shall they be unable to perform miracles by their prayers, but they shall not even be able to obtain pardon for their sins, which is implied in what follows; But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.

[AD 1107] Theophylact of Ohrid on Mark 11:19-26
The greatness of the miracle appears in the drying up so juicy and green a tree. But though Matthew says that the fig tree was at once dried up, and that the disciples on seeing it wondered, there is no reason for perplexity, though Mark now says, that the disciples saw the fig tree dried up on the morrow; for what Matthew says must be understood to mean that they did not see it at once, but on the next day.

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.

For whosoever sincerely believes evidently lifts up his heart to God, and is joined to Him, and his burning heart feels sure that he has received what he asked for, which he who has experienced will understand; and those persons appear to me to experience this, who attend to the measure and the manner of their prayers. For this reason the Lord says, Ye shall receive whatsoever ye ask in faith; for he who believes that he is altogether in the hands of God, and interceding with tears, feels that he as it were has hold of the feet of the Lord in prayer, he shall receive what he has rightly asked for. Again, would you in another way receive what you ask for? Forgive your brother, if he has in any way sinned against you; this is also what is added: And when ye stand praying, forgive, if ye have ought against any: that your Father also which is in heaven may forgive you your trespasses.

[AD 1274] Pseudo-Jerome on Mark 11:19-26
The Lord, leaving darkness behind Him in the hearts of the Jews, went out, as the sun, from that city to another which is well-disposed and obedient. And this is what is meant, when it is said, And when even was come, he went out of the city. But the sun sets in one place, rises in another, for the light, taken from the Scribes, shines in the Apostles; wherefore He returns into the city; on which account there is added, And in the morning, as they passed by, (that is, going into the city,) they saw the fig tree dried up from the root.

Now the fig tree withered from the roots is the synagogue withered from Cain, and the rest, from whom all the blood from Abel up to Zechariah is required.

Peter perceives the dry root, which is cut off, and has been replaced by the beautiful and fruitful olive, called by the Lord; wherefore it goes on: And Peter calling to remembrance saith unto him, Master, behold, the fig tree which thou cursedst is withered away.

Christ then who is the mountain, which grew from the stone, cut out without hands, is taken up and cast into the sea, when the Apostles with justice say, Let us turn ourselves to other nations, since ye judged yourselves unworthy of hearing the word of God. (Acts 13:46)

Mark has, as he is wont, expressed seven verses of the Lord's prayer in one prayer. But what can he, whose sins are all forgiven, require more, save that he may persevere in what has been granted unto him.

[AD 1274] Glossa Ordinaria on Mark 11:19-26
(non occ.) But the Evangelist shows what effect the correction of the Lord had on the ministers of the temple, when he adds: And the Scribes and Chief Priests heard it, and sought how they might destroy him; according to that saying of Amos: They hate him that rebuketh in the gate, and they abhor him that speaketh uprightly. (Amos 5:10) From this wicked design, however, they were kept back for a time solely by fear. Wherefore it is added, For they feared him, because all the people were astonished at his doctrine. For he taught them as one having authority, and not as the Scribes and Pharisees, as is said elsewhere.

[AD 215] Clement of Alexandria on Mark 11:23
This Gnostic, to speak compendiously, makes up for the absence of the apostles, by the rectitude of his life, the accuracy of his knowledge, by benefiting his relations, by "removing the mountains "of his neighbours, and putting away the irregularities of their soul. Although each of us is his

[AD 407] John Chrysostom on Mark 11:23
Prayer is an all-efficient panoply, a treasure undiminished, a mine never exhausted, a sky unobstructed by clouds, a haven unruffled by storm. It is the root, the fountain, and the mother of a thousand blessings. It exceeds a monarch’s power.… I speak not of the prayer which is cold and feeble and devoid of zeal. I speak of that which proceeds from a mind outstretched, the child of a contrite spirit, the offspring of a soul converted—this is the prayer which mounts to heaven.… The power of prayer has subdued the strength of fire, bridled the rage of lions, silenced anarchy, extinguished wars, appeased the elements, expelled demons, burst the chains of death, enlarged the gates of heaven, relieved diseases, averted frauds, rescued cities from destruction, stayed the sun in its course, and arrested the progress of the thunderbolt. In sum, prayer has power to destroy whatever is at enmity with the good. I speak not of the prayer of the lips, but of the prayer that ascends from the inmost recesses of the heart.

[AD 430] Augustine of Hippo on Mark 11:23
Note that Jesus said “for him,” not “for me,” and not “for the Father.” Yet it is certain that no human being does such a thing without God’s gift and workings. Mark well that even if no actual instances of perfect righteousness may be found among humans, that does not rule out perfect righteousness as if it were formally impossible. For it might have been realized if only sufficient responsive willing had been applied, enough to suffice for so great a deed.

[AD 435] John Cassian on Mark 11:23
While we are praying, there should be no hesitation that would intervene or break down the confidence of our petition by any shadow of despair. We know that by pouring forth our prayer we are obtaining already what we are asking for. We have no doubt that our prayers have effectually reached God. For to that degree that one believes that he is regarded by God, and that God can grant it, just so far will one be heard and obtain an answer.