what you think
It's not what you think.
I'm not what you think.
Joe, je sais pas ce que tu crois savoir mais tu te trompes.
Joe, I don't know what you think you know, but you're wrong.
— Reservoir Dogs (1992)
Elle n'est pas ce que tu crois.
She's not what you think.
Not what you think.
Ce n'est pas ce que tu crois !
It's not what you think!
— Harry Potter et la Chambre des secrets (2002)
Fais-tu ce que tu crois être juste ?
Are you doing what you believe is right?