NOTES for Mat 21:18-22
Many people reading these Gospel lines feel sorry for the fig tree, for it is entirely unclear why it had to be withered. Admittedly, those who are puzzled do not pay attention to the many branches thrown the day before beneath the feet of the donkey on which Jesus entered Jerusalem. This mass of greenery, destined to wither, must surely have exceeded the mass of the fig tree. And that is not even to mention the trees cut down for firewood every day.
Nevertheless, such reasoning certainly does not remove the question: what does the event with the fig tree mean? And how are we to understand the words addressed to the disciples, saying that they will be able to do the same? Are they really to be understood as a call to punish those who displease them? Such a superficial interpretation would contradict all the other Gospel episodes. Elsewhere in the Gospel (Lk 13:6-9) there is a parable about a fig tree that the vine-grower tends to the very end. Here too we have a visible parable. For we are all called to bear fruit, and if this fig tree is condemned, it is not because it is incapable of bearing fruit, but because every possibility of correcting it has been exhausted. Notice that Jesus does not pronounce words of condemnation in anger. He does not hurl a curse, but speaks calmly about reality.
The barren fig tree is an image of what we can bring upon ourselves if we do not share what the Lord has given us. For if we do not want to feed someone or serve one who needs us, we ourselves wither, having refused to draw life-giving strength from the One who gives us all the more, the more we give to others.