Augustine of Hippo
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.
(ut sup.) But as with respect to the unfinished tower, he alarms us by the reproaches of those who say, The man began to build, and was not able to finish, so with regard to the king with whom the battle was to be, he reproved even peace, adding, Or else, while the other is yet a great way off, he sendeth an ambassage, and desireth conditions of peace; signifying that those also who forsake all they possess cannot endure from the devil the threats of even coming temptations, and make peace with him by consenting unto him to commit sin.