There is more to somebody/something than meets the eye
Definition 1 of 1
Pro Tip 1/3Hidden Qualities
This phrase often hints at hidden talents or unexpected positive traits in a person or thing. 
She may be shy, but there's more to her than meets the eye; she's a talented artist.
Pro Tip 2/3Avoid Assumptions
Use this phrase to remind others not to judge quickly based on first appearances. 
The old building looks run down, but there's more to it than meets the eye—it's actually a historic landmark.
Pro Tip 3/3Expression Surprise
It expresses that something or someone has surprised us by having qualities we did not expect. 
This book seemed boring at first, but there’s more to it than meets the eye.