(1) The religious idea of being rescued from one’s sins and their consequences.
If this is the ‘feel’ of the salvation motif in your dream, the dream may be expressing a longing for release from (unconscious) guilt-feelings; and, since the unconscious functions at a psychological rather than metaphysical level (using as symbols what metaphysics uses as doctrines), the dream may also be urging you to find within yourself enough love to accept yourself as you are.
(2) The psychological idea of healing and wholeness: the resolving of conflict and the achieving of balance and fullness in the psyche.