James Ward (1843-1925) was a renowned philosopher and psychologist who criticised the objective principles of scientific naturalism. Believing in the primacy of the subject-object relationship for human experience, he rejected the detached perspective of the sciences; coming to the final conclusion that matter is fundamentally derived from mind, and mind is given coherence by the existence of God. This metaphysical belief was derived from his observations as a psychologist during the earlier part of his career, and his understanding that the subject cannot be reduced to a passive receiver of the objective world. This volume, which was originally published in 1911, was based upon the Gifford Lectures given during the years 1907-10. It constitutes a further development of Ward's beliefs into the form of a complete system, and it remains of value to anyone with an interest in philosophy, psychology or phenomenology.