Personality of a person is defined by several things. In those things, behavior plays an important role. Impact of behavior on personality would refer to the organized ways of thinking and acting that express the person’s beliefs, opinions, attitudes and values. When you talk about manners, then you would define them as something that reflects social norms and the demands of the social context. But when you talk of behavior it usually reflects the person’s own conscience.
Manners are on the surface consciousness but behavior is on the depth of the surface. On one hand when manners reflect conduct that the world expects or demands of us, behavior is a conduct that is expressive of our inner attitudes and beliefs. What the society demands something of us, our manners develop into genuine behavior in the individual. Friendly manners may disguise inner anger or anguish because society frowns on their expression, whereas cheerful, warm behavior expresses genuine happy, positive attitudes towards oneself and others. This must have clearly defined the two over mixed notions- manner and behavior.
But it is to understand that our behavior affects our personality to quite an extent. Behavior is superficial and comes through training. It is a channel through which a man expresses himself. The energies for behavior come from the vital emotions, whereas the energies for character come from the mind. The vital energies are short-lived responses to a situation. The ordinary person who is popular with everyone behaves well, has polite manners and does not criticize anyone. He is very presentable in society. But if this is where his growth has stopped, he cannot accomplish anything in the ordinary sense of the word. He cannot find an institution or make a mark in his profession because he is limited only till where he has stopped himself.
The vital impulses that are living in a person are very short-lived. You know what you see and you can be trained and this training is used in situations where there is no stress on the person. The habits which are formed in the phase become your behavior. All habits that are received in the vital stage and that are organized at that stage becomes your behavior. Behavior though changing influences your personality to a large plane. You might feel that you can consciously change your behavior according to the mood and need of the situation but it still shows your personality to large level.