Sacred Tree

Today the word "weird" means strange, unexplainable, odd. Something that is weird is beyond the scope of normal understanding. But in the ancient cultures of Europe, the word had a very different status. The original, archaic form meant in Anglo-Saxon "destiny", but also "power", or "magic" or "prophetic knowledge". "Wyrd" was still the "unexplainable", but the Unexplainable was the Sacred, the very grounding of existence, the force which underlay all of life. And one way in which it manifested was in trees, which were regarded as sacred by the peoples of ancient Europe.

Brian Bates

In Norse mythology, Yggdrasil ("The Terrible One's Horse"), also called the World Tree, is the giant ash tree that links and shelters all the worlds. Beneath the three roots the realms of Asgard, Jotunheim, and Niflheim are located. Three wells lie at its base: the Well of Wisdom (Mímisbrunnr), guarded by Mimir; the Well of Fate (Urdarbrunnr), guarded by the Norns; and the Hvergelmir (Roaring Kettle), the source of many rivers. Four deer run across the branches of the tree and eat the buds; they represent the four winds. There are other inhabitants of the tree, such as the squirrel Ratatosk ("swift teeth"), a notorious gossip, and Vidofnir ("tree snake"), the golden cock that perches on the topmost bough. The roots are gnawed upon by Nidhogg and other serpents. On the day of Ragnarok, the fire giant Surt will set the tree on fire.
Micha F. Lindemans