This is the phenomenon of reflection, reflection of one mind upon another. There are people who may sit together, work together, live together for their whole lives, and yet they may be closed to one another. It is the same reflection. If the heart of one person is closed, its influence is to close the heart of another. A person with closed heart will close the heart of others everywhere he goes. Even the most loving person will helplessly feel the doors of the heart closed, to his greatest regret, not knowing what has happened. It is an unconscious phenomenon.