_The kingdom of heaven is like to leaven, which a woman took and hid in three measures of meal, until the whole was leavened._ --Matthew xiii. 33 {119} This may seem a very strange comparison, my brethren, if, instead of letting it in at one ear, as the saying is, and out at the other, we stop to think of it a moment. For what sort of likeness is there between that glorious kingdom of heaven, which we hope some day to enter, and a little leaven or yeast put into flour to raise it and make it into bread? Surely, we should say, none at all. What could our Lord have meant when he said that the two were alike? But let us think a little more about the matter. Is the kingdom of heaven of which he was speaking that heaven into which all the saved are to enter? Or is there not some other meaning which we may give to the words? There is another meaning, and it is the true one in this place and in many others in the Gospel. It is the kingdom of God or of heaven, not in heaven, but on earth, of which our Saviour is here speaking. When he says the kingdom of heaven, he means the kingdom which he came to establish, his holy Catholic Church. But how is this leaven, or yeast? Well, it is not so very hard to see this. It is because, being put into the world in the beginning in the form of a few weak, poor, and unlearned men and women, like the little spoonful of yeast put into a great mass of flour, it soon spread through the whole known world, and is even now spreading in the same way, changing and influencing in many ways all whom it meets with, even if it does not fully convert them: just as the yeast is spread through the whole of the dough, raising it and making it into good and healthy food. {120} Yes, my brethren, this was the way that the church spread through the world and made its converts, especially in the early times. It was not only by preaching. The Apostles and their successors did not have much chance to preach to the world in general. They were not allowed to do so; public preaching would have brought down on them much greater persecutions than those which they actually suffered, and it would have required great miracles on God's part to preserve his church had such preaching been tried, especially in the great cities. No, they had to teach their doctrine, as we may say, on the sly; in fact, part of it was reserved for those who had already become Christians. It may seem strange now, but in early times no one was allowed to hear anything about the real presence of our Lord in the Blessed Sacrament till after he had been baptized. This was called the discipline of the secret, and was kept up for a long time.