One factor that influences personality is how it is perceived by others. It can be derived through at least three perceptions. One is subjective. This means that personality is seen through impressions formed from how the individual responds in certain situations. Another is objective. This observes and categorizes outward responses. The third is organismic, which considers the inner pattern of a person's character.
There are a number of spiritual propositions that may influence the formation of personality. One is Tagore's proposition. This is that human personality reflects development from physical to "personal" man and is done through the subconscious experiencing of rhythms and harmony with nature. Another is from Gandhi, which places emphasis on the striving of man for truth through actions. A third proposition is from Sri Aurobindo, where the personality of an individual comes through evolution to a "supermind" state as one step towards an ultimate "divine" state.
This suggests that the path towards the development of personality goes from simple to increasingly complex. From birth, the mental structure of an infant develops and spreads slowly. As the child interacts with his environment, different parts of this mental structure will differentiate from each other. In time, these become functionally organized, ultimately moving from a diverse mass of experience-based crystallizations to becoming an integrated personality.
This approach assumes that it is biological and constitutional factors that determine personality. One proposition within this is that personality comes from the nature of embryonic development and the results enable the identification of personality by a large stomach, large muscles or an enlarged head. One example of this approach -- though it is stereotypical -- is that some people think that fat people will be jovial and lean people impulsively angry. It ignores, or at least diminishes, the psychic systems.