The Gospel preaching not only offers manifold gain as a treasure, but is precious as a pearl; wherefore after the parable concerning the treasure, He gives that concerning the pearl. And in preaching, two things are required, namely, to be detached from the business of this life, and to be watchful, which are denoted by this merchant- man.
Truth moreover is one, and not manifold, and for this reason it is one pearl that is said to be found. And as one who is possessed of a pearl, himself indeed knows of his wealth, but is not known to others, ofttimes concealing it in his hand because of its small bulk, so it is in the preaching of the Gospel; they who possess it know that they are rich, the unbelievers, not knowing of this treasure, know not of our wealth.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).