Generosity, kindness, aversion, seeing or hearing are mental phenomena or nāmas, they experience different objects. Sound, flavour, hardness, softness, heat or cold are physical phenomena or rūpa, they do not know anything. If we want to know what is real we should ask ourselves: "Can it be directly experienced?" What is real has a characteristic which there being the need to think about it or to name it. Everything which is real can be directly experienced through the eyes, the ears, the nose, the tongue, the bodysense and the "mind-door," through these six doorways. Thus, if we want to know whether something is real we should ask ourselves: "Can it be directly experienced and through which of the six doorways?" nāmas and rūpas are realities which can be directly experienced without there being the need to think about them or to call them by a name. Hearing is hearing for everybody, everywhere. We can give hearing another name, but its characteristic is the same. Sound is sound for everybody, everywhere. We can give sound another name but its characteristic is the same. Attachment is attachment for everybody, aversion is aversion for everybody. We can change their name, but the realities are the same. Generosity is a reality, it is nāma. We may be inclined to think that there is a person who is generous, that a self is generous, but generosity does not stay. It is not self, only a kind of nāma which arises and falls away. Seeing is real, it is a kind of nāma. We think, "I see," but seeing does not stay, it is impermanent. Where is then the self? There is no person.