" I have a friend whose philosophy is that every single interaction you have with someone leaves them feeling at least a little bit better, or a little bit worse. It’s never neutral. When you start monitoring how you feel when you meet other people, you find he’s absolutely right. It’s almost impossible to come away from even the smallest encounter without feeling invigorated or frustrated or embarrassed or cheered or worried or guilty or positive or inadequate or reassured or ignored or amused. And you’re doing this to other people, as much as they’re doing it to you. What’s "

― Richard Templar , The Rules of People