1) Socrates viewed the self as consisting of two parts - the physical body and the immortal soul. The soul is the true self that survives death.
2) Plato saw the self as composed of reason, physical appetite, and spirit or passion. It is the role of reason to control and harmonize these parts.
3) Freud proposed the self has both a conscious and unconscious aspect, with the latter governed by pleasure and the former by reality. The mind operates through the id, ego, and superego.