Jung, Memories, Dreams, Reflections, p.235:

Our souls as well as our bodies are composed of individual elements which were all already present in the ranks of our ancestors. The “newness” in the individual psyche is an endlessly varied recombination of age-old components. Body and soul therefore have an intensely historical character and find no proper place in what is new, in things that have come into being. That is to say, our ancestral components are only partly at home in such things. … Inner peace and contentment depend in large measure upon whether or not the historical family which is inherent in the individual can be harmonized with the ephemeral conditions of the present.