Sermon XXXI.
The kingdom of heaven is like to leaven,
which a woman took and hid in three measures of meal,
until the whole was leavened.
—St. Matthew xiii. 33.
The kingdom of heaven, my dear friends, means, as you know, in this as well as in many other of our Lord's parables, not God's kingdom in the next world, but in this—that is, his holy Catholic Church. Understanding it in this way, it is easy to see why he compares it to a grain of mustard-seed or to leaven; for it was small in the beginning, but has grown, as the mustard-seed grows, so that it now has spread through the whole earth; and it was not noticed in the beginning, as the little leaven or yeast would not be in the dough into which it is put, but has now made its influence felt in all the world, as that of the yeast is in the bread which it makes.
This was our Lord's intention, that his church should be continually growing till every one should enter it, till every heart should be leavened by its faith. But there are some people—Catholics, too, but a very curious kind of Catholics—who seem to think that the church was only made for those nations or those families which now belong to it, and will even blame those who are converted to it for leaving the religion of their fathers. I do not know what excuse one can make for these persons, except to suppose that God has blessed them with a very small share of common sense.
I do not think that there are many people so stupid as to talk in this way; but there are a good many who act as if they thought as these people seem to think. I do not mean that there are many who give the cold shoulder to converts, for that would be an unjust reproach; but I do mean that there are many Catholics who do not seem to understand the world has got to be converted, and that they themselves have got to do their share towards it; that they are part of that leaven with which our Lord meant that the world should be leavened; that it was by means of them, according to their measure of ability and opportunity, that he meant the faith to be diffused through the world. Every Catholic ought to be a missionary in his way and place, and do something to bring others to that knowledge of the truth which he himself has received.
Not that every Catholic should go out and preach the faith on the corners of the streets, or to people who would laugh at him or do him more harm than he could do them good; but that every one should be on the lookout for those who are sincere and well disposed, and be ready to give them a helping hand, to explain any difficulties which they may have, or to persuade them to come to the priest, who can explain them more fully.
But, above all, that he should spread among those who do not believe the leaven of good example, and not scandalize them by a bad life. One can hardly be too careful to avoid scandalizing even the faithful; and much more care should be taken not to scandalize those who are seeking for the truth, and particularly about those things on which their ideas are very strict and their consciences very sensitive.