Appearances often are deceiving. Aesop
Beware so long as you live, of judging people by appearances. Jean de La Fontaine
We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances. Isaac Newton
The difference between appearances and truth is the same as between warping and weaving. Corsican Proverb
Appearances are deceiving. Portuguese Proverb
Appearances are deceptive. German Proverb