What does John 2:21 mean?

Many times in the gospels, Jesus makes comments about spiritual issues, which are misinterpreted in a physical sense. In verses 18 and 19, Jesus is challenged to produce a miracle. He had disrupted the businesses which had taken over the temple grounds. Local religious leaders demanded a miraculous proof that Christ had the right to do this. Jesus responded by saying that He could rebuild "this temple" in only three days. Solomon had spent years building the first temple. Nehemiah spent years rebuilding it. Herod had spent decades remodeling the current temple. So, claiming that one could rebuild "this temple" in just days sounded absurd. The people thought He meant the brick-and-mortar sanctuary. Instead, Jesus was predicting His upcoming death and resurrection. When Jesus is arrested, this statement will be part of the evidence against Him (Matthew 26:61). And, when He is crucified, it will be used to taunt Him (Matthew 27:40).