In Jungian psychology, archetypes are highly developed elements of the collective unconscious. Being unconscious, the existence of archetypes can only be deduced indirectly by examining behavior, images, art, myths, religions, or dreams. Carl Jung understood archetypes as universal, archaic patterns and images that derive from the collective unconscious and are the psychic counterpart of instinct. They are inherited potentials which are actualized when they enter consciousness as images or manifest in behavior on interaction with the outside world. They are autonomous and hidden forms which are transformed once they enter consciousness and are given particular expression by individuals and their cultures.
Strictly speaking, Jungian archetypes refer to unclear underlying forms or the archetypes-as-such from which emerge images and motifs such as the mother, the child, the trickster, and the flood among others. It is history, culture and personal context that shape these manifest representations thereby giving them their specific content. These images and motifs are more precisely called archetypal images. However it is common for the term archetype to be used interchangeably to refer to both archetypes-as-such and archetypal images.
Jung rejected the tabula rasa theory of human psychological development, believing instead that evolutionary pressures have individual predestinations manifested in archetypes. Jung first used the term primordial images to refer to what he would later term "archetypes". Jung's idea of archetypes was based on Immanuel Kant's categories, Plato's Ideas, and Arthur Schopenhauer's prototypes. For Jung, "the archetype is the introspectively recognizable form of a priori psychic orderedness". "These images must be thought of as lacking in solid content, hence as unconscious. They only acquire solidity, influence, and eventual consciousness in the encounter with empirical facts."