Which when Jesus perceived, he said unto them,
O you of little faith, why reason you among yourselves, because you have brought no bread?
Read Chapter 16
George Leo Haydock
Why do you think? That we might know what effect this discourse of our Saviour had upon his disciples, the evangelist immediately subjoins, then they understood This exposition of Christ freed them from the accusation of the Jews; it made them who were negligent and inattentive, both diligent and attentive, and confirmed them in their faith. (St. Chrysostom)
Wherefore on all accounts He attacks them even with severity, saying, Why reason ye in yourselves, O you of little faith, because you have brought no bread? Perceive ye not yet, neither understand? Have ye your heart hardened? Having eyes, see ye not? Having ears, hear ye not? Mark 8:17-18