But when you pray, use not vain repetitions, as the heathen do: for they think that they shall be heard for their much speaking.
All Commentaries on Matthew 6:7 Go To Matthew 6
John Chrysostom
AD 407
You see that when He was discoursing of almsgiving, He removed only that mischief which comes of vainglory, and added nothing more; neither did He say whence one should give alms; as from honest labor, and not from rapine nor covetousness: this being abundantly acknowledged among all. And also before that, He had thoroughly cleared up this point, when He blessed them that hunger after righteousness.
But touching prayer, He adds somewhat over and above; not to use vain repetitions. And as there He derides the hypocrites, so here the heathen; shaming the hearer everywhere most of all by the vileness of the persons. For since this, in most cases, is especially biting and stinging, I mean our appearing to be likened to outcast persons; by this topic He dissuades them; calling frivolousness, here, by the name of vain repetition: as when we ask of God things unsuitable, kingdoms, and glory, and to get the better of enemies, and abundance of wealth, and in general what does not at all concern us.