In 1912, at the age of thirty-seven, Jung published the original version
of his work, "Transformation and Symbols of the Libido, " which marked
his divulgence from the psychoanalytic school of Freud. It soon became
his most widely known and influential work, and it is important in the
background of "The Freud/Jung Letters." Because it represented a
transitional state in the developement of his theory, Jung long wished
to revise it, and in 1952 he published a completely rewritten edition,
on which this transformation is based. In its author's words, it is an
"extended commmentary on a practical analysis of the prodromal stages of
schizophrenia.