It is manifest all along this discourse, that Christ spake riddles to the Jews, and that they understood not the import and sense of his discourse: Now (saith our Saviour) the reason is, because ye cannot hear, that is, believe, my word: they could and did hear it with their ears; they heard the sound of it, but they could not discern the spiritual sense and meaning of it: it was not given to them to know the mysteries of the kingdom of God, Matthew 13:11. And the reason was, because they suffered themselves to be blinded by prejudice, and by their own lusts and corrupt affections, till God gave them up to a judicial blindness, that hearing they heard, and did not understand; and seeing they saw, and did not perceive.
Related Commentaries of John 8:43
John 8:43
43 Why do ye not understand my speech? even because ye cannot hear my word.