It's no joke!
Christ is risen and if He is not, everything is nothing.
The Scofield Reference Bible, page 1043.
Three women, Mary Magdalene, and Mary the mother of James, and Salome, start for the sepulchre, followed by other women bearing spices. The three find the stone rolled away, and Mary Magdalene goes to tell the disciples (Lk. 23:55–24:9; John 20:1–2). Mary, the mother of James and Joses, draws nearer the tomb and sees the angel of the Lord (Mt. 28:2). She goes back to meet the other women following with the spices. Meanwhile Peter and John, warned by Mary Magdalene, arrive, look in, and go away (John 20:3–10). Mary Magdalene returns weeping, sees the two angels and then Jesus (John 20:11–18), and goes as He bade her to tell the disciples. Mary (mother of James and Joses), meanwhile, has met the women with the spices and, returning with them, they see the two angels (Lk. 24:4–5; Mk. 16:5). They also receive the angelic message, and, going to seek the disciples, are met by Jesus (Mt. 28:8–10).
It will be helpful to get in our minds the order of events on this morning of the Resurrection. I quote from a footnote in The Scofield Reference Bible, page 1043.
Three women, Mary Magdalene, and Mary the mother of James, and Salome, start for the sepulchre, followed by other women bearing spices. The three find the stone rolled away, and Mary Magdalene goes to tell the disciples (Lk. 23:55–24:9; John 20:1–2). Mary, the mother of James and Joses, draws nearer the tomb and sees the angel of the Lord (Mt. 28:2). She goes back to meet the other women following with the spices. Meanwhile Peter and John, warned by Mary Magdalene, arrive, look in, and go away (John 20:3–10). Mary Magdalene returns weeping, sees the two angels and then Jesus (John 20:11–18), and goes as He bade her to tell the disciples. Mary (mother of James and Joses), meanwhile, has met the women with the spices and, returning with them, they see the two angels (Lk. 24:4–5; Mk. 16:5). They also receive the angelic message, and, going to seek the disciples, are met by Jesus (Mt. 28:8–10).
Paul is saying that if Christ be not raised from the dead, then they are foolish to put their lives in danger. However, since Christ is raised from the dead, believers are identified with Him. As Paul said to the believers at Rome, “Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death? Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life” (Rom. 6:3–4). We are joined to a resurrected, living Christ. “Now if Christ was not resurrected, then,” Paul says, “I am foolish to make the sacrifices I have made down here—my life stands in jeopardy every hour. I am constantly in danger of death.”
The Scofield Reference Bible, page 1043.
Three women, Mary Magdalene, and Mary the mother of James, and Salome, start for the sepulchre, followed by other women bearing spices. The three find the stone rolled away, and Mary Magdalene goes to tell the disciples (Lk. 23:55–24:9; John 20:1–2). Mary, the mother of James and Joses, draws nearer the tomb and sees the angel of the Lord (Mt. 28:2). She goes back to meet the other women following with the spices. Meanwhile Peter and John, warned by Mary Magdalene, arrive, look in, and go away (John 20:3–10). Mary Magdalene returns weeping, sees the two angels and then Jesus (John 20:11–18), and goes as He bade her to tell the disciples. Mary (mother of James and Joses), meanwhile, has met the women with the spices and, returning with them, they see the two angels (Lk. 24:4–5; Mk. 16:5). They also receive the angelic message, and, going to seek the disciples, are met by Jesus (Mt. 28:8–10).