Matthew 13:10-14

And the disciples came up and said to Him, “Why do You speak to them in parables?”

And Jesus answered them, “To you it has been granted to know the mysteries of the kingdom of heaven, but to them it has not been granted.

For whoever has, to him more shall be given, and he will have an abundance; but whoever does not have, even what he has shall be taken away from him.

Therefore I speak to them in parables; because while seeing they do not see, and while hearing they do not hear, nor do they understand.

And in their case the prophecy of Isaiah is being fulfilled, which says, ‘ You shall keep on listening, but shall not understand; And you shall keep on looking, but shall not perceive;