3 Now that in order to convey this truth the Lord acted prophetically, I mean that, as concerning this tree, it was not His will merely to exhibit a miracle, but that by the miracle He conveyed the intimation of something to come, there are many things which teach and persuade us, yea even against our wills force us to believe. In the first place, what fault in the tree was it that it had no fruit, when even if it had no fruit at the proper season, that is, the season of its fruit, it would not assuredly be any fault in the tree; for the tree as being without sense and reason could not be to blame.
But to this is added, that as we read it in the narrative of the other Evangelist who expressly mentions this, “it was not the time for that fruit.” For that was the time when the fig-tree shoots forth its tender leaves, which come, we know, before the fruit; and this we prove, because the day of the Lord's Passion was at hand, and we know at what time He suffered; and if we did not know it, we ought of course to give credit to the Evangelist who says, “The time of figs was not yet.”
So then if it was only a miracle that was to have been set forth, and not something to be prophetically figured, it would have been much more worthy of the clemency and mercy of the Lord, to have made green again any tree He might find withered; as He healed the sick, as He cleansed the lepers, as He raised the dead. But then contrariwise, as though against the ordinary rule of His clemency, He found a green tree, not yet bearing fruit out of its proper season, but still not refusing the hope of fruit to its dresser, and He withered it away; as though He would say to us, “I have no delight in the withering away of this tree, but thus I would convey to you, that I have not designed to do this without any cause for it, but only because I desired thereby to convey to you a lesson you might the more regard.
It is not this tree that I have cursed, it is not on a tree without sense that I have inflicted punishment, but I have made you fear, whosoever you are that dost consider the matter, that you might not despise Christ when He is an hungered, that you might love rather to be enriched with fruit, than to be overshadowed by leaves.”
Source: Sermons on Selected Lessons of the New Testament (New Advent)