
Gregory the Great
Catena Aurea · Johannesevangelium 10
I am the good shepherd: the good shepherd giveth his life for the sheep. But he that is an hireling, and not the shepherd, whose own the sheep are not, seeth the wolf coming, and leaveth the sheep, and fleeth: and the wolf catcheth them, and scattereth the sheep. The hireling fleeth, because he is an hireling, and careth not for the sheep.
(Hom. in Evang. xiv.) But whether a man be a shepherd or an hireling, cannot be told for certain, except in a time of trial. In tranquil times, the hireling generally stands watch like the shepherd. But when the wolf comes, then every one shews with what spirit he stood watch over the flock.