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The seat of faith, however, is not consciousness but spontaneous religious experience, which brings the individual's faith into immediate relation with God. Here we must ask: Have I any religious experience and immediate relation to God, and hence that certainty which will keep me, as an individual, from dissolving in the crowd? The Undiscovered Self (1958)
A more or less superficial layer of the unconscious is undoubtedly personal. I call it the "personal unconscious". But this personal layer rests upon a deeper layer, which does not derive from personal experience and is not a personal acquisition but is inborn. This deeper layer I call the "collective unconscious". I have chosen the term "collective" because this part of the unconscious is not individual but universal; in contrast to the personal psyche, it has contents and modes of behaviour that are more or less the same everywhere and in all individuals. The Archetypes and the Collective Unconscious (1934)
Because we cannot discover God's throne in the sky with a radiotelescope or establish (for certain) that a beloved father or mother is still about in a more or less corporeal form, people assume that such ideas are "not true". I would rather say that they are not "true" enough, for these are conceptions of a kind that have accompanied human life from prehistoric times, and that still break through into consciousness at any provocation. Man and His Symbols (1964)