Complex sentence: Most people are responsive to praise and will increase in self-esteem or confidence if a suitable amount of praise is received--in fact some psychological theories hold that a person's life is comprised largely of attempts to win praise for their actions.
Split into simpler sentences: Most people are responsive to praise and will increase in self-esteem or confidence if a suitable amount of praise is received. Some psychological theories hold that a person's life is comprised largely of attempts to win praise for their actions.