This pantheistic doctrine harmonized thoroughly with the Stoic view of human good; but being unable to conceive substance idealistically, they (with considerable aid from the system of Heraclitus) supplied a materialistic side to their pantheism, - conceiving divine thought as an attribute of the purest and most primary of material substances, a subtle fiery aether.
William James (q.v.), on the other hand, in his psychological works shows that the tendency of recent psychology is to personality, interpreted idealistically; though without a very clear appreciation of what a person is, and personality means.