John Chrysostom
Catena Aurea · Markusevangelium 8
And when he had called the people unto him with his disciples also, he said unto them, Whosoever will come after me, let him deny himself, and take up his cross, and follow me. For whosoever will save his life shall lose it; but whosoever shall lose his life for my sake and the Gospel’s, the same shall save it. For what shall it profit a man, if he shall gain the whole world, and lose his own soul? Or what shall a man give in exchange for his soul? Whosoever therefore shall be ashamed of me and of my words in this adulterous and sinful generation; of him also shall the Son of man be ashamed, when he cometh in the glory of his Father with the holy angels.
(Hom. in Matt. 56) And He did not declare the names of those who were about to go up, lest the other disciples should feel some touch of human frailty, and He tells it to them beforehand, that they might come with minds better prepared to be taught all that concerned that vision.