Passage
And he having come into the house, his disciples were questioning him by himself--`Why were we not able to cast it forth?'
And he having come into the house, his disciples were questioning him by himself--`Why were we not able to cast it forth?'
Mark 9:26 and having cried, and rent him much, it came forth, and he became as dead, so that many said that he was dead,
Mark 9:27 but Jesus, having taken him by the hand, lifted him up, and he arose.
Mark 9:28 And he having come into the house, his disciples were questioning him by himself--`Why were we not able to cast it forth?'
Mark 9:29 And he said to them, `This kind is able to come forth with nothing except with prayer and fasting.'
Mark 9:30 And having gone forth thence, they were passing through Galilee, and he did not wish that any may know,
The verse centers on "having", "come", "house", "disciples", "questioning", "himself--", "able", and "cast". It is saying that the verse draws attention to "having" and "come", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 27's "but Jesus having taken him by the..." into verse 29's "And he said to them This kind...", so "having" and "come" belong inside that flow. In Mark context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "having" and "come" with trust shaped by these words, not by a vague optimism outside the passage.