Which indeed is the least of all seeds: but when it is grown, it is the greatest among herbs, and becomes a tree, so that the birds of the air come and lodge in the branches thereof.
All Commentaries on Matthew 13:32 Go To Matthew 13
Jerome
AD 420
I believe that the branches of the gospel tree that grew from the grain of mustard seed signify the different teachings whereon each one of the birds mentioned perches. Let us also take on the feathers of a dove so that, flying to the higher parts, we may dwell on the branches of this tree and make nests for ourselves from the different doctrines and, fleeing from earthly things, hasten to heavenly things. Many people read that the grain of mustard seed is the smallest of all seeds. They read what the disciples say in the Gospel: “Lord, increase our faith,” and the answer given to them by the Savior: “Truly, I say to you, if you have faith even like a mustard seed, you will say to this mountain, ‘Move from here to there,’ and it will move.” They wonder whether an apostle would ask for a small faith or they doubt the Lord concerning what he has to say about small faith. Yet Paul the apostle makes an even greater comparison than faith to a grain of mustard. In fact, what does he say? “If I have all faith so as to move mountains, yet do not have charity, I am nothing.” .
