Crossword puzzle clue "you know it's true"

Like my abs, definitely (you can't see me so you don't know it's not true)

"Demand me nothing: what you know, you know: From this time forth I never will speak word" is his last line

Goo Goo Dolls song that you probably know from the way John Rzeznik snarls "But you don't even know who I am"

"You know that it would be untrue, you know that I would be a ___"

Church bells sound, I know, you wouldn't know as you're a heathen who's never stepped foot in a church before or even walked by one

"You know it's true ..."

"Girl You Know It's True" ___ Vanilli

You know -- know