Hugin and Munin Fly every day Over all the world; I worry for Hugin That he might not return, But I worry more for Munin.
In Norse mythology, Odin; father of the gods and ruler of Asgard; had a pair of ravens named Huginn and Muninn. Their job was to fly around the world during the day and return to Odin in the evening with news of what was happening on Earth (Midgard). Their names mean “thought” and “mind” (or “memory”) respectively, and it’s believed that they represented these aspects of Odin’s daily meditation. While the lord of gods meditated, his thought and mind ventured out to open his consciousness to the goings on of the world under his protection.
Huginn and Muninn also represent the ideas of the fylgia; a supernatural companion that takes animal form in order to accompany a person in relation to their fate or fortune; and hamingja; the personification of the good fortune of a person or family, often in shape-shifting animal form as well. This ties the connection together nicely, as the fortunes of the ruling family of Ponnivala, as well as their enemies, are intimately tied to the treatment and deeds of their close animal companions.
From : http://ponnivala.wordpress.com/tag/huginn-and-muninn/