Is That All There Is? lyrics

[Guitar solo from Let's Move To Cleveland
Philipshalle, Dusseldorf, Germany
May 22, 1982

Ray White rhythm guitar
Steve Vai stunt guitar
Tommy Mars keyboards
Bobby Martin keyboards
Ed Mann percussion
Scott Thunes bass
Chad Wackerman drums]

Submitted by Guest

What do you think is the meaning of Is That All There Is? by Frank Zappa?