And the apostles said to the Lord: Increase our faith.

“Or this is said because faith keeps out the unclean spirit, especially since the nature of the tree falls in with this meaning. For the fruit of the mulberry is at first white in the blossom, and being formed from thence grows red, and blackens as it gets ripe. The devil also having by transgression fallen from the white flower of the angelic nature and the bright beams of his power, grows terrible in the black odour of sin.”

“(de Quæst. Ev. lib. 2. qu. 39.) We may indeed understand that they asked for the increase of that faith by which men believe in the things which they see not; but there is further signified a faith in things, whereby not with the words only, but the things themselves present, we believe. And this shall be, when the Wisdom of God, by whom all things were made, shall reveal Himself openly to His saints face to face.”

“The disciples hearing our Lord discoursing of certain arduous duties, such as poverty, and avoiding offences, entreat Him to increase their faith, that so they might be able to follow poverty, (for nothing so prompts to a life of poverty as faith and hope in the Lord,) and through faith to guard against giving offences. Therefore it is said, And the Apostles said unto the Lord, Increase our faith.”

“And the Apostles said to the Lord , Increase our faith. The Apostles said this, when, from their little faith, they had been unable to cast out the devil from the lunatic They then asked for greater faith, as appears from the above words compared with those of S. Matt. xvii. 19, &c., for Christ made the same reply in each place, “If you had faith as a grain of mustard seed you would move mountains.””

“And the Lord said,.... In answer to the disciples. The Syriac version leaves out the word "Lord": and the Persic version, in the room of it reads, "Jesus": if ye had faith as a grain of mustard seed; See Gill on Mat 17:20. ye might say unto this sycamine tree; which was near at hand; for in Galilee, where Christ now was, such trees grew, especially in lower Galilee: hence those words (u); "from Caphar-Hananiah, and upwards, all the land which does not bear "sycamines", is upper Galilee, and from Caphar-Hananiah, and downwards, all which does bear "sycamines", is lower Galilee.'' This, by Maimonides (w), is said to be a wild fig tree; but the Vulgate Latin, Syriac, Arabic, and Ethiopic versions render it, the "mulberry tree": and that the sycamine and mulberry tree are the same, Beza shows from Dioscorides, Athenaeus, and Galen; though whether it is the same with the sycamore in Luk 19:4 is not certain. The first of these writers makes them to be the same; and the last asserts they are different, and so they should seem by their different names. Be thou plucked up by the root, and be thou planted in the sea, and it should obey you: for such a tree to be plucked up by the root at a word speaking, is very wonderful and miraculous, and beyond the power of nature; and much more for it to remove into the sea, and plant itself there, where trees grow not; and to believe this should be done, and such a word of command obeyed, one should think required very great faith; and yet, if it was but as a grain of mustard seed, which is very small, it might be done. The design is to show, what great things are done by faith, and what an increase of it they should have. (u) Misna Sheviith, c. 9. sect. 2. (w) In Misna Demai, c. 1. sect. 1. & in Bava Bathra, c. 2. sect. 11.”

“Increase our faith - This work of pardoning every offense of every man, and that continually, seemed so difficult, even to the disciples themselves, that they saw, without an extraordinary degree of faith, they should never be able to keep this command. But some think that this and what follows relate to what Matthew has mentioned. Mat 17:19, Mat 17:20.”

“Increase our faith. The disciples having heard our Saviour inculcating maxims hard to flesh and blood, such as avoiding scandal, and forgiving our enemies, humbly beg their faith may be increased, that they may be able to comply with these maxims; for they had heard Christ say, that every thing was possible to him that believed. (Theophylactus) — Christ compares faith to a grain of mustard seed; because, though the grain be small, it is nevertheless stronger than most herbs. (St. Chrysostom)”

“Lord--(See on Luk 10:1). increase our faith--moved by the difficulty of avoiding and forgiving "offenses." This is the only instance in which a spiritual operation upon their souls was solicited of Christ by the Twelve; but a kindred and higher prayer had been offered before, by one with far fewer opportunities. (See on Mar 9:24.)”