Final answer:
Maslow's statement "What a man can be, he must be," expresses the concept of self-actualization, which is the pinnacle of his hierarchy of needs. It represents achieving one's full potential and is a central focus of humanistic psychology.
Step-by-step explanation:
Abraham Maslow famously stated, "What a man can be, he must be." This statement refers to the highest level on his hierarchy of needs: self-actualization. Unlike the lower needs like physiological or safety needs, self-actualization is the fulfillment of individual potential. As a part of the humanistic perspective in psychology, self-actualization reflects the emphasis on positive human capacities and the motivation towards personal growth once basic needs are met.
Maslow's hierarchy is often visualized as a pyramid, with the most fundamental physiological needs at the bottom, rising to safety, love and belonging, esteem, and ultimately self-actualization at the top. In achieving self-actualization, a person has reached their full potential and experiences a sense of accomplishment, creativity, and the realization of their abilities.