John Gill Commentary Acts 28:26

"saying, Go thou unto this people, and say, By hearing ye shall hear, and shall in no wise understand; And seeing ye shall see, and shall in no wise perceive:" — Acts 28:26 (ASV)

Saying, go unto this people, and say
A message sent in wrath and judgment to the people of Israel, rejected from being the people of God, a "lo ammi" being written upon them; and therefore God does not call them "his", but "this" people: and this message was sent by an evangelical prophet, who foretold, in the clearest manner, the Messiah's incarnation, and birth of a virgin, the work he was to do, the sufferings he should undergo, and the glory that should follow; and that after he had seen in a vision the glory of the King Messiah, the perfections of deity filling the temple of his human nature, him exalted on a throne, and attended and worshipped by angels; after he had had such a view of his beauty and excellency, that laid him low in his own sight, and humbled him under a sense of his own impurity and unworthiness; and after he had had a comfortable discovery and application of pardoning grace;

and after he had expressed such a readiness and willingness to go on the Lord's errand: which one might have thought would have been of a different nature; and that he would have been sent, and have been made useful, to set forth the glories and excellencies of Christ's person, office, and grace, he had had such a view of; and to preach the comfortable doctrine of pardoning grace to men, which he had just now such a gracious experience of; but on the contrary, he is bid to say,

hearing ye shall hear ;
with bodily ears, the Gospel preached by the Messiah and his apostles:

and shall not understand ,
spiritually and experimentally, what they heard: to have an opportunity of hearing the Gospel, is a great blessing; seeing it is good news, glad tidings of good things, a joyful sound, and the voice of Christ himself; it is a distinguishing favour, and what all men at all times have not; when it is attended with a divine energy, the Spirit of God is received through it, regeneration, quickening and sanctifying grace are by it; faith comes by hearing it, and Christ is found under the ministration of it; and, generally speaking, the understanding and knowledge of divine things, are by means of it: men are naturally without the understanding of spiritual things, and where the Gospel is not, they remain so; the ministers of the Gospel, and the word preached by them, are the means of leading men into a spiritual understanding of things, though only as, and when attended with the Spirit of God, who is a Spirit of wisdom and revelation, in the knowledge of Christ: and a special mercy it is when persons, whilst hearing the word, understand what they hear, and can distinguish truth from error; and approve of the truth, receive the love of it, feel the power, and taste the sweetness of it; find it and eat it, believe, embrace, and profess it, and bring forth fruits worthy of it: but on the contrary, when it is heard and not understood, it is an awful dispensation; for hence either they content themselves with bare hearing, and depend upon it for salvation; or they despise and speak evil of what they do not understand; and so their hearing, instead of being a blessing, is an aggravation of their condemnation:

and seeing ye shall see :
miracles wrought:

and not perceive ;
them to be proofs of the things, for which they are wrought: so Jarchi expounds those words,

``ye shall see the wonders, or miracles I have done for you, and shall not set your hearts to know me'' from whence it appears that the Gospel preached in the clearest and most powerful manner, and even miracles wrought in confirmation of it, are insufficient for conversion; and nothing will effect it, but efficacious grace.