The Soul and Self in Norse Mythology
It is a Norse belief that the soul and self are made up of multiple parts.
Lyke - the actual physical body, brought to life by the gods.
Hamr - the energetic or astral body, the shape or skin you wear that is perceived by others.
Fylgja - the accompanying guardian, the external (and typically animal) extension of yourself that represents your true character. Can generally only be seen by those with second sight or in dreams. Seeing your fylgja bloodied is an omen of your impending death.
Hamingja - the personified and inherent luck and fortune from your familial line, the extension of yourself that is your personal power. This part of your soul could be lent to others to assist in times of great peril. Certain individuals (hamrammr) can also perform hamfarir, or a shapejourney, where you shift your hamingja into an animal and can roam the world. If your hamingja was harmed, then so was your human body.
Sinne - the mind, made up of two parts: hugr (the conscious mind) and munr (the unconscious mind). This is personified in Odin’s two ravens, Hugin and Munin.
Önd - the spirit or life breath that distinguishes the living from the dead.
Goði/Gyðja - the higher or divine self, the voice behind intuition that remains forever loyal and true to your best interests.
Öðr - the divine consciousness, the ultimate inspiration or enlightenment through which you experience the divine.