Then came the disciples to Jesus apart
Or "secretly", as the Vulgate Latin, and Munster's Hebrew Gospel
read; that is, privately, and when alone; and as Mark says, "when
he was come into the house"; and was by himself, then came the
nine disciples to him, to converse with him about this matter,
and said unto him, why could not we cast him
out?
That is, the devil, and so cure the lunatic; the Syriac and
Persic versions render it, "why could not we heal him?" The
lunatic; which only could be done by casting out the demon: they
were concerned, fearing they had lost the power which Christ had
bestowed on them, and wanted to know what they had done, which
had deprived them of it; and what should be the cause of their
late unsuccessful attempt, when they had so frequently triumphed
over the unclean spirits, that were subject to them. Though they
might have learned from the answer Christ gave to the father of
the lunatic, and the general character of the Jewish nations in
that answer, the true reason of their own inability; but this
they took no notice of, imagining it belonged entirely to others,
and not to them.