Mark 8:17
And when Jesus knew it, he saith unto them, Why reason ye, because ye have no bread? perceive ye not yet, neither understand? have ye your heart yet hardened?
And when Jesus knew it,.... As he did immediately, by his omniscience; for as he knew the thoughts and reasonings of the Scribes and Pharisees, Matthew 9:4, so he did those of his own disciples:
he saith unto them, Why reason ye because ye have no bread? or imagine that I have given you this caution on that account; or are distressed because this is your case, as if you should be reduced to great difficulties, by reason of your forgetfulness and negligence:
perceive ye not yet, neither understand? the meaning of the parabolical expressions, which he had used them to; or his power in providing food for them, and supporting a great number of persons with very little food, of which they had some very late instances:
have ye your heart yet hardened? as after the first miracle; see Mark 6:52, for it might have been expected, that by a second miracle of the loaves, their understandings would have been more enlightened, and their faith increased, and that they would have relinquished their gross notions, their anxieties, doubts, and unbelief.