Passage
But he answering them says, O unbelieving generation! how long shall I be with you? how long shall I bear with you? bring him to me.
But he answering them says, O unbelieving generation! how long shall I be with you? how long shall I bear with you? bring him to me.
Mark 9:17 And one out of the crowd answered him, Teacher, I brought to thee my son, who has a dumb spirit;
Mark 9:18 and wheresoever it seizes him it tears him, and he foams and gnashes his teeth, and he is withering away. And I spoke to thy disciples, that they might cast him out, and they could not.
Mark 9:19 But he answering them says, O unbelieving generation! how long shall I be with you? how long shall I bear with you? bring him to me.
Mark 9:20 And they brought him to him. And seeing him the spirit immediately tore him; and falling upon the earth he rolled foaming.
Mark 9:21 And he asked his father, How long a time is it that it has been like this with him? And he said, From childhood;
The verse centers on "answering", "says", "unbelieving", "generation", "long", and "shall". It is saying that the verse draws attention to "answering" and "says", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 18's "and wheresoever it seizes him it tears..." into verse 20's "And they brought him to him And...", so "answering" and "says" 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 "answering" and "says" with trust shaped by these words, not by a vague optimism outside the passage.