Rogers believed that all behavior is motivated by self-actualizing tendencies, whichdrive a person to achieve at their highest level. As a result of their interactions with the environment and others, an individual forms a structure of the self or self-concept—an organized, fluid, conceptual pattern of concepts and values related to the self. If a person has a positive self-concept, they tend to feel good about who they are and often see the world as a safe and positive place. If they have a negative self-concept, they may feel unhappy with who they are.