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general::
Phrase(s): Believe nothing of what you hear, and only half of what you see.
Prov. Rumors are usually false, and sometimes the things you see can be misleading as well; be very skeptical until there is proof. • Jill: I heard the football team is losing its best player. He has not been at practice for two days. Jane: Believe nothing of what you hear, and only half of what you see. • The paper reported that the city government is going bankrupt, but I believe nothing of what I hear, and only half of what I see.
McGrawhill's American Idioms And Phrasal Verbs