Mark 4:32

Now let us consider the nature of mustard, and the power of comparison. The mustard seed itself is certainly a cheap and simple thing: if it is ground, it releases its strength. Similarly, faith at first seems simple, but if it is tested by adversity, it reveals the grace of its virtue; so that it also fills others who either hear or read with the fragrance of itself. The mustard seed of our martyrs is Felix, Nabor, and Victor: they had the fragrance of faith, but it was hidden. Persecution came, they laid down their weapons, bowed their necks, and with a broken sword spread the grace of their martyrdom throughout the whole world, so that it may rightly be said: Their sound has gone out into all the earth.

But faith is worn in one way, pressured in another, and sown in another. The Lord Himself is the grain of mustard seed. He was blameless from injury, but as the grain of mustard seed which the people had not crushed, he did not know. He preferred to be worn, so that we may say: "For we are the good odor of Christ unto God."

(non occ. leg. ap. Possin. Cyril.) And also because the wisdom spoken amongst the perfect expands, to an extent greater than all other sayings, that which was told to men in short discourses, for there is nothing greater than this truth.

In the same manner, then, the catholicity of our mother becomes palpable when others who are not her sons make war on her. It is a fact that this little branch of worshipers in Africa has been broken off from the great tree which embraces the whole world in the spreading of its branches. She is in labor with them in charity, that they may return to the root without which they cannot have true life.

It is up to us to sow this mustard seed in our minds and let it grow within us into a great tree of understanding reaching up to heaven and elevating all our faculties; then it will spread out branches of knowledge, the pungent savor of its fruit will make our mouths burn, its fiery kernel will kindle a blaze within us inflaming our hearts, and the taste of it will dispel our unenlightened repugnance. Yes, it is true: a mustard seed is indeed an image of the kingdom of God. Christ is the kingdom of heaven. Sown like a mustard seed in the garden of the virgin's womb, he grew up into the tree of the cross whose branches stretch across the world. Crushed in the mortar of the passion, its fruit has produced seasoning enough for the flavoring and preservation of every living creature with which it comes in contact. As long as a mustard seed remains intact, its properties lie dormant; but when it is crushed they are exceedingly evident. So it was with Christ; he chose to have his body crushed, because he would not have his power concealed.… Christ became all things in order to restore all of us in himself. The man Christ received the mustard seed which represents the kingdom of God; as man he received it, though as God he had always possessed it. He sowed it in his garden, that is in his bride, the Church. The Church is a garden extending over the whole world, tilled by the plough of the gospel, fenced in by stakes of doctrine and discipline, cleared of every harmful weed by the labor of the apostles, fragrant and lovely with perennial flowers: virgins' lilies and martyrs' roses set amid the pleasant verdure of all who bear witness to Christ and the tender plants of all who have faith in him. Such then is the mustard seed which Christ sowed in his garden. When he promised a kingdom to the patriarchs, the seed took root in them; with the prophets it sprang up; with the apostles it grew tall; in the Church it became a great tree putting forth innumerable branches laden with gifts. And now you too must take the wings of the psalmist's dove, gleaming gold in the rays of divine sunlight, and fly to rest for ever among those sturdy, fruitful branches. No snares are set to trap you there; fly off, then, with confidence and dwell securely in its shelter.

But the preaching of the word, once sown upon the earth, expanded and grew, so that the birds of the air rest upon it, that is, all people of lofty and elevated mind and knowledge. Indeed, how many wise men found rest in this preaching, having abandoned Greek wisdom! Thus the preaching became greater than all else and put forth great branches. For the apostles went forth like branches: one to Rome, another to India, a third to Achaia, and the rest to other lands of the earth.

But the preaching of it has been spread far and wide over the earth, and increased so, that the birds of heaven, that is, contemplative men, sublime in understanding and knowledge, dwell under it. For how many wise men among the Gentiles, quitting their wisdom, have found rest in the preaching of the Gospel! Its preaching then is greater than all.

Again, it put forth great boughs, for the Apostles were divided off as the boughs of a tree, some to Rome, some to India, some to other parts of the world.

Or else, that seed is very small in fear, but great when it has grown into charity, which is greater than all herbs; for God is love, (1 John 4:16) whilst all flesh is grass. (Isa. 40:6 But the boughs which it puts forth are those of mercy and compassion, since under its shade the poor of Christ, who are meant by the living creatures of the heavens, delight to dwell.

I know quite well that, to you as to me, the Church which once felt like a refuge, now often feels like a trap. There is nowhere else to go! (I wonder if this desperate feeling, the last state of loyalty hanging on, was not, even more often than is actually recorded in the Gospels, felt by Our Lord's followers in His earthly life-time?) I think there is nothing to do but to pray, for the Church, the Vicar of Christ, and for ourselves; and meanwhile to exercise the virtue of loyalty, which indeed only becomes a virtue when one is under pressure to desert it...

The 'protestant' search backwards for 'simplicity' and directness - which, of course, though it contains some good or at least intelligible motives, is mistaken and indeed vain. Because 'primitive Christianity' is now and in spite of all 'research' will ever remain largely unknown; because 'primitiveness' is no guarantee of value, and is and was in great part a reflection of ignorance. Grave abuses were as much an element in Christian 'liturgical' behaviour from the beginning as now. (St Paul's strictures on eucharistic behaviour are sufficient to show this!)

Still more because 'my church' was not intended by Our Lord to be static or remain in perpetual childhood; but to be a living organism (likened to a plant), which develops and changes in externals by the interaction of its bequeathed divine life and history - the particular circumstances of the world into which it is set. There is no resemblance between the 'mustard-seed' and the full-grown tree. For those living in the days of its branching growth the Tree is the thing, for the history of a living thing is pan of its life, and the history of a divine thing is sacred.

The wise may know that it began with a seed, but it is vain to try and dig it up, for it no longer exists, and the virtue and powers that it had now reside in the Tree. Very good: but in husbandry the authorities, the keepers of the Tree, must look after it, according to such wisdom as they possess, prune it, remove cankers, rid it of parasites, and so forth. (With trepidation, knowing how little their knowledge of growth is!) But they will certainly do harm, if they are obsessed with the desire of going back to the seed or even to the first youth of the plant when it was (as they imagine) pretty and unafflicted by evils. The other motive (now so confused with the primitivist one, even in the mind of any one of the reformers): aggiornamento: bringing up to date: that has its own grave dangers, as has been apparent throughout history. With this 'ecumenicalness' has also become confused.