Yggdrasil is world tree connecting the nine realms of Norse mythology. What are the nine realms of Norse mythology? According to Henry Adams, the names of the nine realms of Norse mythology are Ásgarðr, Vanaheimr, Álfheimr, Miðgarðr, Jötunheimr, Múspellsheimr, Svartálfaheimr, Niflheimr, and Niðavellir.
Yggdrasil (also Yggdrasill) is the name of the World Tree, the Axis Mundi, the Mandala, and the tree of life (the cosmos itself).
The Poetic Edda and the Prose Edda described Yggdrasil as follows,
Yggdrasil is an immense tree that is center to the cosmos and considered very holy. The gods go to Yggdrasil daily to assemble at their things (aka "governing assemblies"). (Wikipedia)
The cosmos is a forest summarized into one tree: Yggdrasil. The tree is the man named Jesus.
I am the vine; you are the branches. (John 15:5) "NIV"
The vine: the tree (Jesus)
The tree: Yggdrasil
The branches: the other trees in the forest
Jesus was the first man to become the tree of life (the Axis Mundi). Therefore others who came later to become trees of life like him are his branches.
Trees of righteousness: others that are like Jesus
Jesus was a royal seed that sprouted and grew into the tree of life. The ten sefirot are the first fruits of the tree of life. Each sefirah (or sefira) was a seed that became a tree, such that the ten sefirot became twelve trees (not ten trees). Each of the twelve trees had its own fruits which sprouted into trees. Those trees have also produced royal seeds that have become trees.
The number of trees of life continues to increase in a geometric proportion as more fruits are produced, more seeds planted, and more seeds sprouting into new trees.
Jesus (a single tree) is magnified into the immense tree known as Yggdrasil.
"The gods go to Yggdrasil daily to assemble" implies that every human being that enters into the Holy of Holies is a god. He is a god because God dwells in him.
Here is a further description of the Yggdrasil:
The branches of Yggdrasil extend far into the heavens, and the tree is supported by three roots that extend far away into other locations; one to the well Urðarbrunnr in the heavens, one to the spring Hvergelmir, and another to the well Mímisbrunnr. (Wikipedia)
The two wells and the spring are the three persons of the Blessed Trinity. The first well is the throne of the Father, the second well is the throne of the Son, and the spring is the Holy Spirit.
Urðarbrunnr (the first well) = Father
Mímisbrunnr (the second well) = Son
Hvergelmir (the spring) = Holy Spirit
The two wells and the spring constitute the baptism described as follows,
Go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit (Matthew 28:19) "NIV"
The baptism is the stream (Hvergelmir) flowing from the two wells into the hearts of men. Urðarbrunnr is wisdom, Mímisbrunnr is understanding, and Hvergelmir is the sum of wisdom and understanding. This means that the spring is wisdom and understanding flowing from the wells into the hearts of humans.
The spring is the river of the water of life described as follows,
The angel showed me the river of the water of life, as clear as crystal, flowing from the throne of God and of the Lamb (Revelation 22:1) "NIV"
Pure river of water of life: Hvergelmir (the spring)
Clear as Crystal: cleans
God: the Father
The Lamb: the Son
The throne of God: the well Urðarbrunnr
The throne of the Lamb: the well Mímisbrunnr
Proceeding out of the throne of God and of the Lamb: the spring (Hvergelmir) flows out of the well Urðarbrunnr and the well Mímisbrunnr
The water of life is the Holy Spirit, and the Holy Spirit is the sum of the Father and the Son.
The Holy Spirit in the hearts of men is eternal life. Whoever has wisdom and understanding has the Father and the Son, and eternal life.
This is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent. (John 17:3) "NIV"The only true God: the Father (Wisdom)
Jesus Christ: the Son (understanding)