Luke 5:15

And although the Lord in giving out remedies advised telling them to no one, instructing us to avoid pride; yet His fame flew about every where, instilling the miracle into the ears of every one, as it follows, But so much the more went there a fame abroad of him.

Though the leper was silent, the voice of the transaction itself was sufficient to publish it to all who acknowledged through him the power of the Curer.

Now the perfect healing of one brings many multitudes to the Lord, as it follows, And great multitudes came together that they should be healed. For the leprous man that he might show both his outward and inward cure, even though forbid ceases not, as Mark says, to tell of the benefit ho had received.

But lest leprosy should become rife among us, let each avoid boasting after the example of our Lord's humility. For it follows, And he commanded him that he should tell it to no one, that in truth he might teach us that our good deeds are not to be made public, but to be rather concealed, that we should abstain not only from gaining money, but even favour. Or perhaps the cause of His commanding silence was that He thought those to be preferred, who had rather believed of their own accord than from the hope of benefit.

And that the Priest also should know that not by the order of the law, but by the grace of God above the law, he was cured. And since a sacrifice is commanded by the regulation of Moses, the Lord shows that He does not abrogate the law, but fulfil it. As it follows, And offer for thy cleansing according as Moses commanded.