Jesus answered, “If I want him to remain alive until I return, what is that to you? You must follow me.” Because of this, the rumor spread among the believers that this disciple would not die. But Jesus did not say that he would not die; he only said, “If I want him to remain alive until I return, what is that to you?”
To the end, the disciples still had issues understanding the meaning of things Jesus said. When I don’t fully understand what He said, I’m in good company.