Man is a symbol-forming organism. He has constant need of a meaningful inner formulation of self and world in which his own actions, and even his impulses, have some kind of "fit" with the "outside" as he perceives it.

In The Development and Acquisition of Values (Bethesda, MD: National Institute of Child Health and Human Development, 1969) p. 42. Report of a conference, May 15-17, 1968, Washington, D.C. Reported in O. W. Markley and Willis W. Harman (eds.) Changing Images of Man (Pergamon Press, 1982) ch. 1, p. 1