Do not doubt but believe. Blessed are those who have not seen and yet have come to believe. Now Jesus did many other signs in the presence of his disciples, which are not written in this book. But these are written so that you may come to believe that Jesus is the Messiah, the Son of God, and that through believing you may have life in his name. But those details not withstanding, there is a clear account that all the writers believed that Jesus did really rise from the dead.
None give a scientific explanation.
All agree that the tomb was empty. Passive Evidence Jesus must have been really dead - those who were responsible for putting people into tombs were competent at what they did. Jesus body would have been wrapped in a mummy-like existence. It would have been impossible to unwrap ones self from the inside. No body was ever found.