The id is the only component of personality that is present from birth. This aspect of personality is entirely unconscious and includes of the instinctive and primitive behaviors. According to Freud, the id is the source of all psychic energy, making it the primary component of personality. The id is driven by the pleasure principle, which strives for immediate gratification of all desires, wants, and needs. If these needs are not satisfied immediately, the result is a state anxiety or tension.