Please someone who make sense in Japanese language can Help?

Because of that, you'd think like "that'd be good." We have always searched for eternity by returning (note: don't know to what,) haven't we? For example, if you listen to "『Die Schuldigkeit des ersten Gebotes[" 100 years or even 200 years from now, you'd hear Mozart's music vividly. That's one of eternity, isn't it?