Kernberg
Otto Kernberg has provided an extensive discussion of idealization, both in its defensive and adaptive aspects. He conceptualised idealization as involving a denial of unwanted characteristics of an object, then enhancing the object by projecting one’s own libido or omnipotence on it. He proposed a developmental line with one end of the continuum being a normal form of idealization and the other end a pathological form. In the latter, the individual has a problem with object constancy and sees others as all good or all bad, thus bolstering idealization and devaluation. At this stage idealization is associated with borderline pathology. At the other end of the continuum, idealization is said to be a necessary precursor for feelings of mature love.
Read more about this topic: Idealization And Devaluation