John Chrysostom — as excerpted in the Catena Aurea on Mark 10:35-40

“(ubi sup.) Or else He says, Ye know not what ye ask; as if He said, Ye speak of honours, but I am discoursing of wrestlings and toil; for this is not a time of rewards, but of blood, of battles, and dangers. Wherefore He adds, Can ye drink of the cup that I drink of, and be baptized with the baptism that I am baptized withal? He draws them on by way of question, that by communication with Himself, their eagerness might increase.”