When we study the Gospel of Mark, we are actually studying our own biography. This means that the biography of Jesus is also our biography. In the words of a hymn, "He is my history," and "His life is my experience" (Hymns, #949). Therefore, the biography narrated in Mark is not only a biography of the individual Jesus but also a biography of the believers.
In particular, the Gospel of Mark is a biography of Peter, our representative. Peter is present in the first chapter of Mark, and his name is specifically mentioned in the last chapter: "Go, tell His disciples and Peter that He is going before you into Galilee" (16:7). Furthermore, the cases in this book are a composite portrait of us as represented by Peter. For example, on the Mount of Transfiguration Peter said, "Rabbi, it is good for us to be here; and let us make three tents, one for You and one for Moses and one for Elijah" (9:5). Because Peter is our representative, his speaking here is also our speaking. Likewise, when Peter denied the Lord three times, that was also our threefold denial of the Lord. The angel's word concerning Peter in 16:7 is also a word concerning us. As we read this verse, it is correct to insert our name in the place of Peter's name, since we are represented by him.
From the time Peter was called by the Lord Jesus in 1:16 and 17, he was captured by Him and was always with Him. Along with James and John, he was with the Lord on the Mount of Transfiguration. This indicates that wherever the Lord Jesus went, Peter went with Him, for the Lord brought Peter with Him.
Do you believe that when the Lord Jesus was crucified, He left Peter and the other disciples? No, when the Lord Jesus was crucified and buried, Peter, the representative of us all, was crucified with Him. Moreover, the Lord Jesus was not resurrected alone. According to God's point of view, which is beyond the elements of space and time, we all were included in Christ's resurrection.