john 8:56 Your father Abraham rejoiced to see my day: and he saw it, and was glad. - Free Bible Online

      56. Abraham rejoiced to see my day, &c.--exulted, or exceedingly rejoiced that he should see, he exulted to see it, that is, by anticipation. Nay,
      he saw it, and was glad--he actually beheld it, to his joy. If this mean no more than that he had a prophetic foresight of the gospel-day--the second clause just repeating the first--how could the Jews understand our Lord to mean that He "had seen Abraham?" And if it mean that Abraham was then beholding, in his disembodied spirit, the incarnate Messiah [STIER, ALFORD, &c.], the words seem very unsuitable to express it. It expresses something past--"he saw My day, and was glad," that is, surely while he lived. He seems to refer to the familiar intercourse which Abraham had with God, who is once and again in the history called "the Angel of the Lord," and whom Christ here identifies with Himself. On those occasions, Abraham "saw ME" (OLSHAUSEN, though he thinks the reference is to some unrecorded scene). If this be the meaning, all that follows is quite natural.

JFB.