Gregory the Great
Catena Aurea · Lukasevangelium 14
For which of you, intending to build a tower, sitteth not down first, and counteth the cost, whether he have sufficient to finish it? Lest haply, after he hath laid the foundation, and is not able to finish it, all that behold it begin to mock him, Saying, This man began to build, and was not able to finish. Or what king, going to make war against another king, sitteth not down first, and consulteth whether he be able with ten thousand to meet him that cometh against him with twenty thousand? Or else, while the other is yet a great way off, he sendeth an ambassage, and desireth conditions of peace. So likewise, whosoever he be of you that for-saketh not all that he hath, he cannot be my disciple.
(in Hom. ut sup.) Or else, in that awful trial we come not to the judgment a match for our king, for ten thousand are against twenty thousand, two against one. He comes with a double army against a single. For while we are scarcely prepared in deeds only, he sifts us at once both in thought and deed. While then he is yet afar off, who though still present in judgment, is not seen, let us send him an embassy, our tears, our works of mercy, the propitiatory victim. This is our message which appeases the coming king.