"How big is your bubble?"
During the course of your life you will be around people. If you could add up the number of people that you have ever been around– even those that you never even met– it gets to be a pretty big number. For example, if you went to a professional football game, all of the people in the stadium, the football players, and even the people watching the game on TV when the camera pans past you count. You do not even have to be see the other person in order to influence someone (the fact alone that you are reading this and may have never met me proves it).
Any time you come in contact with someone, you will influence them. Influence can be conscious, unconscious, or even subconscious in nature. If you notice someone, talk to them, or even read something they wrote– most likely it is conscious because you are aware of their influence. If you are not aware of the influence by someone it is most likely unconscious because you are employing unconscious communication to relate to something even though the person is not around. If you are unaware of the persons presence but are still influenced by them, then it is subconscious.
Because of the fact that you can influence people through many different levels, and the number influenced is very large— if you could quantify those numbers you should be able to see how big your sphere of influence truly is.