Gregory the Great
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. 32. in Evang.) There are however some, who confess Christ, because they see that all men are Christians; for if the name of Christ were not at this day in such great glory, the Holy Church would not have so many professors. The voice of profession therefore is not sufficient for a trial of faith whilst the profession of the generality defends it from shame. In the time of peace therefore there is another way, by which we may be known to ourselves. We are ever fearful of being despised by our neighbours, we think it shame to bear injurious words; if perchance we have quarrelled with our neighbour, we blush to be the first to give satisfaction; for our carnal heart, in seeking the glory of this life, disdains humility.