People are impressionable. Every day we see things, notice things, observe the actions of others and take mental photographs or notes on what happens around us. Some of it is immediately processed, some of it takes time and is quietly digested into our unconscious minds. You watch a stranger sip a cup of coffee in an odd manner, and it sticks with you. Someone treats another employee in a way that ruffles your moral compass, and you begin to look at both in a different light.