Bede the Venerable — as excerpted in the Catena Aurea on Mark 9:30-37

“(ubi sup.) This ignorance of the disciples proceeds not so much from slowness of intellect, as from love for the Saviour, for they were as yet carnal, and ignorant of the mystery of the cross, they could not therefore believe that He whom they had recognised as the true God, was about to die; being accustomed then to hear Him often talk in figures, and shrinking from the event of His death, they would have it, that something was conveyed figuratively in those things, which he spoke openly concerning His betrayal and passion. It goes on: And they came to Capernaum.”