where does the quote "you think you know but you have know idea" come from?

Answer 1

I don't know if this is where the words originated, but they do appear in this song.

“Until”
by Raheem DeVaughn
2005

[Chorus]
Until you know my joy, know my pain, and know my struggles
Until you've walked these shoes, paid my dues, and felt my troubles
Until you've shared my tears, known my fears, in all my years
Only til then, you only know what you think you know

Answer 2

that mtv show - i think it was called diary or something, where they shadowed a celeb for a day or so

i love that saying though, and use it all the time, it's my quote on my myspace page...

Answer 3

MTV, Diary