The Human Psychological Pattern

In my opinion, the expectation we pose up on eachother effects the real expectations themselves, and can sometimes make it a self-fullfiling prophecy.

E.g.: If I expect that people are cheap, and I try with my best effort to get money from them in a way, that they don't know about, because I think they would not give it to me voluntarily.

This sends an unconscious message to my customers, that I want to steal from them, which enhances their cheapness, and we start a negative spiral.