But this kind goes not out but by prayer and fasting.
All Commentaries on Matthew 17:21 Go To Matthew 17
John Chrysostom
AD 407
Whence it is plain that the disciples’ faith was grown weak, yet not all, for those pillars were there, Peter, and James, and John.
But it is to be known, that, as ofttimes the faith of him that draweth near to receive supplies the miraculous virtue, so ofttimes the power of those that work the miracle is sufficient even without the faith of those who sought to receive. Cornelius and his household, by their faith, attracted to them the grace of the Holy Spirit It happened that the disciples were then weak in faith; for indeed they were but in an imperfect condition before the cross; wherefore He here tells them, that faith is the mean of miracles, "Verily I say unto you, if ye shall have faith as a grain of mustard-seed, yes hall say to this mountain, Remove hence, and it shall remove.”.
So He not only promises the removal of mountains, but goes beyond, saying, “And nothing shall be impossible to you.”.
If you shall ask, Where did the Apostles remove mountains! I answer, that they did greater things, bringing many dead to life. It is told also of some saints, who came after the Apostles, that they have in urgent necessity removed mountains. But if mountains were not removed in the Apostles’ time, this was not because they could not, but because they would not, there being no pressing occasion. And the Lord said not that they should do this thing, but that they should have power to do it.Yet it is likely that they did do this, but that it is not written, for indeed not all the miracles that they wrought arewritten.
And this He says not of lunatics in particular, but of the whole class of daemons. For fast endues with great wisdom, makes a man as an Angel from heaven, and beats down the unseen powers of evil. But there is need of prayeras even still more important. And who prays as he ought, and fasts, had need of little more, and so is not covetous, but ready to almsgiving. For he who fasts, is light and active, and prays wakefully, and quenches his evil lusts, makes God propitious, and humbles his proud stomach. And he who prays with his fasting, has two wings, lighter than the winds themselves. For he is not heavy and wandering in his prayers, (as is the case with many,) but his zeal is as the warmth of fire, and his constancy as the firmness of the earth. Such an one is most able to contend with daemons, for there is nothing more powerful than aman who prays properly. But if your health be too weak for strict fast, yet is it not for prayer, and if you cannot fast, you can abstain from indulgences. And this is not a little, and not very different from fast.
