appearances are deceptive

ことわざ

It is not possible to judge a person's character from their outward appearance.

日本語の意味

人は見た目で判断できない / 外見は必ずしも真実を反映していない / 見た目に惑わされず本質を見極めるべきである

Since appearances are deceptive, don't assume someone's lazy without asking about their situation.

人は見かけによらないから、事情を聞かずに誰かを怠け者だと決めつけないでください。

意味（1）

It is not possible to judge a person's character from their outward appearance.