And in them the prophecy of Isaiah is being fulfilled, which says: “You will keep hearing and will not understand, you will keep looking and will not see.
Jesus points out that the words of the prophet Isaiah are being fulfilled in the people of his time, and he begins to quote the prophet Isaiah’s words (Isa. 6:9–10). Although they hear God’s word and witness Jesus’ works, their hearts are hardened, and they do not grasp the truth. This saying shows that spiritual understanding depends on a person’s inner readiness. Those who have an open heart understand, but those who are indifferent or rejecting remain blind and deaf in a spiritual sense.