The Irminsul is such an important symbol. Personally it holds such a deep meaning and is just important as the Thor's Hammer as a symbol of our faith. It represents Eternal law - to which even the Gods are subject to. It is the Pillar of Cosmic Law, the Rit-Tir which is an absolute authority - the Divine laws of Nature.
Rit - World Order
Tir - Cosmic Order
I believe that the Irminsul faith came around during the age of Taurus which was around 4500-1900BCE and we can find numerous carvings of the Irminsul from Sumer from around this time. This Sumerian Tree of Life is the Greek letter Tau (which is the root of Taurus) - the letter itself the shape of an Irminsul.
Tau - the cross of saint Anthony
To the Aryans at this time the Tau would have represented divine order, and would have most likely been a representation of the Milky way - which itself is sacred to the cow Audhumla. The symbol would have passed from the Sumerians to the Scythians, who are the distant ancestors of us Germanic volk. The World-Tree is of course an archetypal symbol central to all Aryan cultures, including the Ario-Hindu.
Via the Greek Tau we find the Irminsul hidden within the Tarot cards - the 12th card is the 'Hanged Man' who hangs from the letter Tau. This is a parallel of Odin hanging on the World Tree. There are many distortions of this card - most notable is the Hanged Man hanging from the hebrew letter Chet - the first letter of the hebrew word for life. It is important to remember that when we see a 'christian' cross - it is the image of a European man that hangs in suffering. European man that is sacrificed on the hebrew cross.
It was the SS leader Walter Blachetta who described the Irminsul as being the Horns of Aries. The Irminsul certainly resembles the astrological sign for the Ram. We know that there was an Irminsul pillar raised by the Saxons at Eresburg in Germany - Eres being a Saxon form of the god Ares.The site is now known as Marsburg after Mars. All these gods have overlapping roles as War gods -Tyr (Tiw/Tir) Ares, Mars etc. In the book 'The Deeds of the Saxons' Res gestae saxonicae sive annalium libri tres the monk Widukind of Corvey describes the gods that the Saxons associated with the Irminsul. Widukind was the name of the pagan Saxon resistance leader, so for a monk to be named after him has thrown up interesting questions. Widukind wrote in an unbiased fashion towards the Saxons and is believed to be a direct descent from the pagan Saxon Widukind. The monk Widukind describes a Saxon Irminsul as being raised in honour of the god Hirmin (whom we call Irmin) and he compares this god to Hermes and Mars.
Aries - Ares
Most noticeable is the masculine symbol of the Irminsul, especially as there are so many War gods connected with the Pillar. However there is a feminine aspect which seems ignored - as the Irminsul is the Tree of Life - the Yggdrasil - which is the womb of our race. Remember the humans Lif and Lifthrasir dwell within the Tree. Life and Lifthrasir are Life and Eager for Life, whom are the life force of our race and the future generations of Aryans to come.