In his 1926 revision of The Psychology of the Unconscious Processes, he highlighted the significance of the midlife transition.

He argued that the first half of life could be characterized as the natural phase, in which the prime aim was establishing oneself in the world, earning an income, and raising a family.

The second half, the cultural phase, involved a reevaluation of earlier values.  ~The Black Books, Vol. I, Page 99