Not everyone have empathy

Recently, I'm doing an assignment about to write an attitude. I have chosen empathy as my topic.

It is unacceptable that some people think we must help the others when we can? 

And why should I?

If don’t share things or help them so I will become a stingy person?!

I’ll help people when it is still in my ability to help. And of course …

Isn't it should I help them? I think their attitude whilst getting help from others people are important for me to evaluate whether should I help. 

And also…

Did they really try their best to do but really can’t achieve? 

If not, I don’t think I should suppose to help them.