Apple or Orange?

What is in your thought when you see this picture? (I found this in Facebook)

apple or orange?

If we see from the outside, it is an apple, but the inside is an orange. Generally, people know that apple is sweet, and orange is sour. 

I don't want to discuss about the taste or characteristics for both apple and orange, but I want to relate this picture with our life (based on my experience and knowledge).
 Before that, I apologize if there are many grammar errors.

1.Don't judge a person by his/her appearance, because we don't know his/her interest..

2.Some people just smile because they don't want other people to see their sadness.

3. In some organizations/ companies, they must have some problems even though other people outside see them as successful organization/ company.

4. In healthy aspect, not all skinny people are away from diseases, I mean obesity. 

5. As a student, when teacher asks if there any question, students will say no, meanwhile, they don't know what to ask..  

6. In every sweet memories, there must be some unsweet memories.

7. Not all the good things that we see are good until we know the truth of that things. (vice versa)

So, just be sincere with what we do. Have a nice day ^_^