Looks can be Deceiving

It seems that we have a tendency to associate what is beautiful to good and what is ugly as being evil. Life, however, isn't as black and white as you'll find just as much beauty in evil as you will find ugly in good. We associate beauty with good because it's pleasing and what is pleasing must be good and what is ugly/displeasing must be evil. 

While this association to morality is unrealistic it's still widely accepted as the interpretation of good/evil in religious text or society in general.

As a kid, I was convinced that Satan was a displeasing looking creature and angels were the most beautiful things that existed. Now that I'm older, I know that appearances can be deceiving and evil can look pleasing to the eyes while good isn't necessarily. 

Evil can also be in institutions that advertises itself as being a place of good such as churches. How many atrocities were committed in the name of God?

Some people have fostered a reputation of doing good deeds only to hide their evil deeds when nobody is looking.

Appearance can be deceiving - trust but verify.