Who said "The Other is not what he claims to be."?

This quote is attributed to Piranesi.

The Other is not what he claims to be. - Piranesi

"The Other is not what he claims to be."

Piranesi Truth

Character in Piranesi

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"I am afraid that I do not know who I am."

"I have always lived in the House."

"The tides bring messages from the Other."

"I am not entirely alone here."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."