Luke 24:43 Meaning

41And while they yet believed not for joy, and wondered, he said unto them, Have ye here any meat?

42And they gave him a piece of a broiled fish, and of an honeycomb.

43And he took it, and did eat before them.

44And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.

45Then opened he their understanding, that they might understand the scriptures,