¿De verdad dijo William Shakespeare «There is nothing either good or bad, but thinking makes it so»?

¿De verdad dijo William Shakespeare «There is nothing either good or bad, but thinking makes it so»?

Encontrado palabra por palabra. Sí. El texto aparece en obras atribuidas a William Shakespeare. Fuente y ubicación abajo.

… if the word is to be used, was, like Shakespeare's own, the immediate product of the wondering and meditating mind; and such thoughts as that celebrated one, 'There is nothing either good or bad but thinking makes it so,' surely needed no special training to produce them. Or does Portia's remark, 'Nothing is good without respect,' _i.e._, out of relation, prove that she had studied metaphysics?
Shakespearean Tragedy Lectures on Hamlet, Othello, King Lear, Macbeth — A. C. Bradley, ¶353 · Public domain (US), Project Gutenberg #16966 · fuente

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