Mark 8:21

HEALING OF A DEMONIAC BOY--SECOND EXPLICIT ANNOUNCEMENT OF HIS APPROACHING DEATH AND RESURRECTION. ( = Mat 17:14-23; Luk 9:37-45). (Mark 9:14-32) And when he came to his disciples, he saw a great multitude about them, and the scribes questioning with them--This was "on the next day, when they were come down from the hill" (Luk 9:37). The Transfiguration appears to have taken place at night. In the morning, as He came down from the hill on which it took place--with Peter, and James, and John--on approaching the other nine, He found them surrounded by a great multitude, and the scribes disputing or discussing with them. No doubt these cavillers were twitting the apostles of Jesus with their inability to cure the demoniac boy of whom we are presently to hear, and insinuating doubts even of their Master's ability to do it; while they, zealous for their Master's honor, would no doubt refer to His past miracles in proof of the contrary.

In this chapter, we have, I. Christ's miraculous feeding of four thousand with seven loaves and a few small fishes (Mar 8:1-9). II. His refusing to give the Pharisees a sign from heaven (Mar 8:10-13). III. His cautioning his disciples to take heed of the leaven of Pharisaism and Herodianism (Mar 8:14-21). IV. His giving of sight to a blind man at Bethsaida (Mar 8:22-26). V. Peter's confession of him (Mar 8:27-30). VI. The notice he gave his disciples of his own approaching sufferings (Mar 8:31-33), and the warning he gave them to prepare for sufferings likewise (Mar 8:34-38).

8:21 Don’t you understand yet? This question implies a time when they would truly understand. Mark’s readers knew that Jesus’ resurrection would give the disciples understanding of Jesus’ identity and power (see, e.g., Acts 4:23-31).