Matthew Poole and continuators on Matthew 17:23

23 And they shall kill him, and the third day he shall be raised again, And they were exceeding sorry.

Mark saith, Ch. 9.30, 31, 32. And they departed thence, and passed through Galilee, and he would not that any Man should know it. For he taught his Disciples, and said unto them, the Son of Man is delivered into the Hands of Men, and they shall kill him, and after that he is killed, he shall rise the third Day. But they understood not that Saying, and were afraid to ask him. Luke saith, Ch. 9.44. he said unto them, Let these Sayings sink down into your Ears; for the Son of Man shall be delivered into the hands of Men. But they understood not this Saying, and it was hid from them; that they perceived it not, and they feared to ask him that saying: It is said, That Christ taught his Disciples, as they were able to hear, Mar. 4.33.9. he tells them Ioh. 16.12. He had many things to say unto them, but they could not hear them at that time. Christ a long time concealed the Doctrine of his Passion, and Resurrection from the dead, from them, until he had confirmed them in the great point of his Divine Power, and his being the true Messiah; now he begins to deliver this Doctrine unto them, that what they should now soon see, might not weaken their Faith in him, as the Messiah and the Son of God: Partly, in regard of that inveterate Opinion, which had possessed the Generality of the Iews, that the Messiah should be a temporal Prince, and should deliver the Iews from that Servitude, under which they were, and had for a long time been: Partly, in regard of the Difficulty to conceive, how he who was the Son of God could dye. Once or twice before therefore he had begun to speak to them, about his Passion, Ch. 16.21. Moses and Elias, had some Discourse with him about it, Luk. 9.31. The Text saith, They understood it not, It was hid from them. They perceived it not. They were afraid to ask him. They were Sorry. Possibly they were sorry, that they could not understand it, and reconcile it to the Notion of the Messias, they had drank in, for it seems hard to assert, they were sorry for what Christ said about his suffering, because the Scripture saith, they understood it not, thinking our Saviour had not spoken plainly of a matter of Fact which should be, but that he intended something else, besides what his Words seemed plainly to import.