Passage
And he said unto them, This kind can come out by nothing, save by prayer.
And he said unto them, This kind can come out by nothing, save by prayer.
Mark 9:27 But Jesus took him by the hand, and raised him up; and he arose.
Mark 9:28 And when he was come into the house, his disciples asked him privately, [How is it] that we could not cast it out?
Mark 9:29 And he said unto them, This kind can come out by nothing, save by prayer.
Mark 9:30 And they went forth from thence, and passed through Galilee; and he would not that any man should know it.
Mark 9:31 For he taught his disciples, and said unto them, The Son of man is delivered up into the hands of men, and they shall kill him; and when he is killed, after three days he shall rise again.
The verse centers on "said", "kind", "come", "nothing", "save", and "prayer". It is saying that the verse draws attention to "said" and "kind", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 28's "And when he was come into the..." into verse 30's "And they went forth from thence and...", so "said" and "kind" 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 "said" and "kind" with trust shaped by these words, not by a vague optimism outside the passage.