“Jesus said unto him, If thou canst believe, all things are possible to him that believeth.”
King James Version (KJV)
9:23 If thou canst believe - As if he had said, The thing does not turn on my power, but on thy faith. I can do all things: canst thou believe?
Mr 9:23 If thou canst believe. The question is not whether Jesus can, but whether the afflicted father can. Can he have the needful faith in Christ? Faith is the great need.