Origen
Catena Aurea · Lukasevangelium 9
And he said to them all, If any man will come after me, let him deny himself, and take up his cross daily, and follow me. For whosoever will save his life shall lose it: but whosoever will lose his life for my sake, the same shall save it. For what is a man advantaged, if he gain the whole world, and lose himself, or be cast away? For whosoever shall be ashamed of me and of my words, of him shall the Son of man be ashamed, when he shall come in his own glory, and in his Father’s, and of the holy angels. But I tell you of a truth, there be some standing here, which shall not taste of death, till they see the kingdom of God.
(ut sup.) He assigns the cause of this when He adds, For whosoever will save his life shall lose it; that is, whosoever will according to the present life keep his own soul fixed on things of sense, the same shall lose it, never reaching to the bounds of happiness. But on the other hand He adds, but whosoever shall lose his life for my sake, shall save it. That is, whosoever forsakes the things of sense looking upon truth, and exposes himself to death, as it were losing his life for Christ, shall the rather save it. If then it is a blessed thing to save our life, (with regard to that safety which is in God,) there must be also a certain good surrender of life which is made by looking upon Christ. It seems also to me from resemblance to that denying of one’s self which has been before spoken of, that it becomes us to lose a certain sinful life of ours, to take up that which is saved by virtue.