In psychoanalysis, libido involved in the cathexis of oneself, in contradistinction to object libido, which is libido involved in the cathexis of an external instinctual object. Sigmund Freud (1856–1939) discussed this distinction in 1914 in his article ‘On Narcissism: An Introduction’ (Standard Edition, XIV, pp. 73–102, at pp. 77–81), where he theorized that an energy balance exists, ego libido decreasing as object libido increases, and vice versa. Also called narcissistic libido. See also narcissism.