Id
The id, as previously stated, is the source of our drives and considered to be the reservoir of libido. 'The libido' or simply 'libido', is the form of energy cathected upon objects or an affect received from objects, predominantly sexual, which underlies all mental processes. Our drives surge forth from the id and apply libidinal energy to objects, which may result in aggressive or erotic attachments/actions upon chosen objects. The drives of the id are considered to be inborn, operating within the primary psychical processes (those of the unconscious) and are absolutely determined according to the pleasure principle. It is said that the id behaves as though it were unconscious, the reason thought to be is that our ego and our super-ego's ideals and pressures are often in conflict with the id's, causing repression, as the gratification of the id's drives would often be devastating in terms of social and self-image.