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Don't judge a book by its cover

🇬🇧you cannot know what something or someone is like by looking only at that person or thing's appearance

🇹🇷kimseyi dış görünüşüne göre yargılama; zarfa değil mazrufa bak

🇷🇺не судите о книге по её обложке; эквивалент - встречают по одежке, провожают по уму