Who said "I'm still not sure, but I think there's a monkey in my closet."?

This quote is attributed to Phoebe Buffay.

I'm still not sure, but I think there's a monkey in my close... - Phoebe Buffay

"I'm still not sure, but I think there's a monkey in my closet."

Phoebe Buffay Imagination

"Oh my god, I can't believe you don't know that!"

"Life is like a box of chocolates, except I'm allergic to chocolate."

"Love is like a beautiful song that gets stuck in your head forever."

"Sometimes you just have to let go and see what happens."

"Imagination is more powerful than knowledge."

"The world is full of wonders if you know where to look."

"You have the imagination of a child, Lucy"

"The world is full of mysteries waiting to be solved."