It means 'don't judge people by their appearance.' And I understood it as 'don't let someone's appearance overshadow his or her other features when you get to know the person.' Honestly I sometimes judge people by their appearance especially at first meet. For example, person with lots of piercings or street fashion seems to have strong personality and I don't go close to person with creepy face(it doesn't mean ugly face. It means feeling from their eyes, facial expressions and postures doesn't seem to be safe.) These kind of things hinders me to be close to some people. But after I meet people several times, the judgement about the people changes by their other features. So the conclusion is I feel guilty of judging people by their appearance but I don't want to change. Because the judgements change after first meet so it doesn't play a big role when I make friends and also it's impossible to get rid of it perfectly.

Hello, Seong Eun!

Thanks for writing your homework. 

I appreciate your diligence in studying, you are very commendable. ^^ 

Have a great day! See you around!

-T.Jhozel 

It means 'don't judge people by their appearance.' 

>> Correct!
OR: It means, 'Don't judge people based on their appearance.' 

And I understood it as 'don't let someone's appearance overshadow his or her other features when you get to know the person.' 

>> Correct!
OR: And I interpreted it as 'Don't let someone's appearance overshadow his or her other characteristics when you get to know them.' 

Honestly I sometimes judge people by their appearance especially at first meet. 

>> Correct!
OR: Honestly, I sometimes judge people based on their appearance, especially when we first meet. 

For example, person with lots of piercings or street fashion seems to have strong personality and I don't go close to person with creepy face(it doesn't mean ugly face. 

>> Correct!
OR: For example, a person with a lot of piercings or street fashion appears to have a strong personality, whereas I avoid people with creepy faces (which does not imply ugly faces). 

It means feeling from their eyes, facial expressions and postures doesn't seem to be safe.) 

>> Correct!
OR: It means that their eyes, facial expressions, and posture do not appear to be safe.) 

These kind of things hinders me to be close to some people. 

>> Correct!
OR: These kinds of things make it difficult for me to be close to certain people. 

But after I meet people several times, the judgement about the people changes by their other features. 

>> Correct!
OR: But after meeting people several times, my perception of them changes based on their other characteristics. 

So the conclusion is I feel guilty of judging people by their appearance but I don't want to change. 

>> Correct!
OR: So, in conclusion, I feel guilty for judging people based on their appearance, but I refuse to change. 

Because the judgements change after first meet so it doesn't play a big role when I make friends and also it's impossible to get rid of it perfectly.

>> Correct!
OR: Because judgments change after the first meeting, it no longer plays a significant role when I make friends, and it is impossible to completely eliminate.