Isn't this where we came in?
Pink Floyd - Outside The Wall/In The Flesh?

Pink Floyd : Speak To Me

"I've been mad for fucking years, absolutely years, been over the edge for yonks, been working me buns off for bands..."

"I've always been mad, I know I've been mad, like the
most of us...very hard to explain why you're mad, even if you're not mad..."

[The Dark Side Of The Moon - 1973]