only when purpose

My mother told me.

She want me to remind, that in this world people will come to you if they are have purpose.
After they are finish, they will leave you. This kind of bad people. You never know which one is good and which one is bad.

So, to avoid hurt because meet the wrong person, just think that you do the best you can, and leave it also.
Never ask a reply from them.

Then everytime they hurt you, you will never regret if you ever do a good thing for them.
I will always do everything by heart. They can remember or not, I do not care.
God is never sleep. Every good thing that you do, it will give you also a good thing someday.