  In his autobiography, Persons and Places, Santayana describes the development of his thought as a movement from the idealisms of boyhood to the intellectual materialism of a traveling student, and finally to the complete, naturalistic outlook of the adult Santayana. He emphasizes the continuity of his life and beliefs, contrasting what may appear to be disparate views with the overall unity of his thought: “The more I change the more I am the same person” (Persons and Places, 159).