Then said he,
Unto what is the kingdom of God like? and to what shall I compare it?
All Commentaries on Luke 13:18 Go To Luke 13
Ambrose of Milan
AD 397
In another place, a grain of mustard seed is introduced where it is compared to faith. If then the mustard seed is the kingdom of God, and faith is as the grain of mustard seed; faith is truly the kingdom of heaven, which is within us. A grain of mustard seed is indeed a mean and trifling thing, but as soon as it is crushed, it pours forth its power. And faith at first seems simple, but when it is buffeted by adversity, pours forth the grace of its virtue. The martyrs are grains of mustard seed. They have about them the sweet odor of faith, but it is hidden. Persecution comes; they are smitten by the sword; and to the farthest boundaries of the whole world they have scattered the seeds of their martyrdom. The Lord Himself also is a grain of mustard seed; He wished to be bruised that we might see that we are a sweet savor of Christ. He wishes to be sown as a grain of mustard seed, which whena man takes he puts it into his garden. For Christ was taken and buried in a garden, where alsohe rose again and became a tree, as it follows, And it waxed into a great tree. For our Lord isa grain when He is buried in the earth, a tree when He is lifted up into the heaven. He is also atree overshadowing the world, as it follows, And the fowls of the air rested in his branches; that is, the heavenly powers and they whoever (for their spiritual deeds) have been thought worthy to fly forth. Peter is a branch, Paul is a branch, into whose arms, by certain hidden ways of disputation, we who were afar off now fly, having taken up the wings of the virtues. Sow then Christ in your garden; a garden is truly a place full of flowers, wherein the grace of your work may blossom; and the manifold odor of your different virtues be breathed forth. Wherever is the fruit of the seed, there is Christ.
Many think Christ is the leaven, for leaven which is made from meal, excels its kind in strength, not in appearance. So also Christ(according to the fathers) shone forth above others equal in body, but unapproachable in excellence. The Holy Church therefore represents the type of the woman, of whom it is added, Which a woman took and hid in three measures of meal, fill the whole was leavened.
But we are the meal of the woman which hide the Lord Jesus in the secrets of our hearts, until the heat of heavenly wisdom penetrates our innermost recesses. And since He says it was hid in three measures, it seems fitting that we should believe the Son of God to have been hid in the Law, veiled in the Prophets, manifested in the preaching of the Gospel. Here however I am invited to proceed farther, because our Lord Himself has taught us, that the leaven is the spiritual teaching of the Church. Now the Church sanctifies with its spiritual leaven the man who is renewed in body, soul, and spirit, seeing that these three are united in a certain equal measure of desire, and there breathes forth acomplete harmony of the will. If then in this life the three measures abide in the same person until they are leavened and become one, there will be hereafter an incorruptible communion with them that love Christ.
