The sign has wording on it that says BELIEF + DOUBT = SANITY.
Large painting on a wall that says "Belief+Doubt=Sanity".
Belief + Doubt = Sanity is written on a wall
A number of slogans are written in block letters on the floor and one also on the wall that reads: BELIEF + DOUBT = SANITY.
walls inside of a building that say 'belief+doubt=sanity'