2:18-22 What did Jesus mean by what He said here?

Jesus was prophesying His death here. This temple He would raise up in three days was His body, which after His death would be resurrected in three days.

The disciples did not understand what Jesus meant until after His resurrection (CP Mk 9:30-32; Lu 18:31-34; 24:1-8; Jn 12:16).