Consciousness is the quality or state of being aware of an external object or something within oneself.
The
unconscious mind (or the unconscious) consists of the processes in the mind that occur automatically and are not available to introspection, and include thought processes, memory, affect, and motivation.
The
psyche is the totality of the human mind, conscious, and unconscious. Jung called psyche
Self.
The
persona, for Swiss psychologist Carl Jung, was the social face the individual presented to the world—"a kind of mask, designed on the one hand to make a definite impression upon others, and on the other to conceal the true nature of the individual". Persona is part of ego.
Contrary to a Freudian conceptualization of
shadow, therefore, the Jungian shadow often refers to all that lies outside the light of consciousness, and may be positive or negative.