He that hath ears to hear, let him hear. A way of speaking used by Christ, when anything serious, and of great importance, was delivered; and which required attention, and was not easily understood: and such were the several things he had mentioned in this context; as that John was more than a prophet, more excellent than all the prophets; that the law and prophets were now at an end, and that John was Elias; which things, if rightly understood, would serve greatly to settle their judgment, with respect to himself as the Messiah: but his words imply, that everyone had not spiritual ears and understandings, to hear and take in things of such an high nature, and excellent use; none but those to whom they were given; and such ought to attend to them, and, seriously weigh and consider the importance of them.
The phrase is to be met with in Jewish writings, where it is thus expressed ;""He that hears let him hear, and he that understandeth let him understand";''See Mt 13:43. Zohar in Num. fol. 60.