1 Corinthians 15:5 Meaning

3For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures;

4And that he was buried, and that he rose again the third day according to the scriptures:

5And that he was seen of Cephas, then of the twelve:

6After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep.

7After that, he was seen of James; then of all the apostles.