Strong or Weak

what do you think is strong or weak?
It is strong when someone make fun of you and bully you around while you not do anything back?
Or is that weak?
Is it strong when people try to take away your dignity and you try to ignore them? Or it that weak?
If to contain everything inside and finally some day it will brake, is it strong to hit your enemy so he/she will get a taste of how it feels, or take it out on yourself.

What is strong or weak, and what would you do?
What should I do?