What goes around, comes around. How do you think about this sentence?

I think this sentence like proverb in Thai.
The definition of this sentence mean if you do a good thing, a good think will back to you.
If you do a bad thing, a bad thing will back to you also.
However the like more explain, I find just short words. There are 5 words very easy to remember.
What about you know more? Can you tell me?