Appearances are deceptive

Origin
This proverb was first recorded in the mid 17th-century.
Explanation
The way something or someone looks from outside may give us the wrong impression. Meeting people for the first time we always make a judgement based on their appearances though the proverb tells us not to make such a mistake. Appearances are really deceptive; it’s like a wrap of a sweet. I believe that everyone at least once in his/her life unwrapped a sweet in a bright paper but instead of a chocolate sweet found there just caramel. Or vice versa sometimes a really tasty candy is hidden under a very unattractive wrapping paper. The same I can say about people. It’s very easy to form a negative opinion about a person just because you don’t like the way he looks, and it becomes like a barrier for further communication between you and this person, though in fact he can be an interesting, well-educated and talented person with whom you have lots of things in common. So, never judge people by appearances, because appearances are deceptive!
Examples
Edward seems like a very nice boy, but appearances are deceptive.
Jane may look like she doesn’t understand you, but she’s really bright. Appearances are deceptive.