Cross reference
Luke 10:23
23 And having turned unto the disciples, he said, by themselves, `Happy the eyes that are perceiving what ye perceive;
Matthew 13:16-17
16 `And happy are your eyes because they see, and your ears because they hear,
17 for verily I say to you, that many prophets and righteous men did desire to see that which ye look on, and they did not see, and to hear that which ye hear, and they did not hear.