Essence
The ka is the life-force; the ba is the mobile aspect; the akh is the effective, luminous state achieved through proper rites and ethical living.
Sources & References
See also
Ma'at — Truth, Order, Justice
Ma'at names the principle and goddess of truth, right order, balance, and cosmic-ethical harmony in ancient Egypt.
42 Assessors of Ma'at
Spell 125 of the Book of the Dead names a tribunal of forty-two assessors before whom the deceased declares innocence. This site lists a representative, cited subset; full names vary by manuscript.
Gates of the Duat
The night journey of Ra passes through gates guarded by deities; Books of the Amduat and Gates describe their order and names.