Kohut’s Freudian Vision includes a paper, "Concepts and Theories of Psychoanalysis," jointly prepared in 1963 by Kohut and Rubovits-Seitz, that spells out, elaborates on, and clarifies the themes encapsulated in the preceding synopsis of Freud’s views. Rubovits-Seitz describes how Kohut’s precision of language and his insistence on absolute clarity of expression delayed the completion of this essay, in which one can see the seeds of Kohut’s later ideas beginning to sprout among the metapsychological thicket. In particular, he elaborates at some length his notion of optimal frustration as the key to healthy development and, far more than Freud, the direct correlation between the quality of parental response and formative childhood experience.