The New John Gill Exposition of the Entire BibleMatthew 8:7
And Jesus saith unto him, I will come and heal him.
answer of Christ's, which is short and full, not only shows the
readiness of Christ to do good, how soon and easily he complied with
the centurion's request, it being a prayer of faith, and so
effectual, and was heard as soon as delivered; but also contains an
absolute promise that he would heal him. He does not say that he
would come and see him, and what his case was, and do what he could
for him, as ordinary physicians do; but he would come and heal him
at once: and indeed it is a proposal of more than what was asked of
him; his presence was not asked, and yet he offered it; though Luke
says, that he besought him by the messengers to "come and heal his
servant"; and so this is an answer to both parts of the request; the
whole is granted. Christ cannot deny anything to faith, his
presence or assistance.