Power

 I do believe that when a person is stronger, people use to think that they are more powerful, so with better arguments
For example, I see that my aunt is always saying to my cousing that he cannot do anything! He's playing and it's wrong, he eats and it's wrong and my cousing is always saying like WHY IS IT WRONG!? 
My aunt always tells him that she's a wise woman, and everything she does is for his own benefit. Which actually makes no sense at all.