Scott Adams said this quote

You’ve seen for yourself that when a sad person enters a room, the mood in the room drops. And when you talk to a cheerful person who is full of energy, you automatically feel a boost. I’m suggesting that by becoming a person with good energy, you lift the people around you. That positive change will improve your social life, your love life, your family life, and your career. When I talk about increasing your personal energy, I don’t mean the frenetic, caffeine-fueled, bounce-off-the-walls type of energy. I’m talking about a calm, focused energy. To others it will simply appear that you are in a good mood. And you will be.