You haven't learned life's lesson very well if you haven't noticed that you can give the tone or colour, or decide the reaction you want of people in advance. It's unbelievable simply. If you want them to take an interest in you, take an interest in them first. If you want to make them nervous, become nervous yourself...It's as simple as that. People will treat you as you treat them. It's no secret. Look about you. You can prove it with the next person you meet.
