“I ween that I hung on the windy tree,
Hung there for nights full nine;
With the spear I was wounded,
and offered I was To Othin, myself to myself,
On the tree that none may ever know
What root beneath it runs.”
-from the Hávamál in the Poetic Edda
Odin, in His insatiable need for knowledge, for power, spent nine days and nine nights dangling from Yggdrasil. Wounded by spear, accepting no food or drink. In a very shamanic initiatory way, He gave up who He was to become Who He was intended to be. He was willing to spend the time and painfully prove His worth to the Runes which resulted in Their revealing Themselves to Him. He succeeded and came to know the insights and magic of the Runes which only the Norns could employ at that point, They Who carve the symbols into the roots of Yggdrasil, sending magic along the Tree to produce the desired effect in all the Nine Worlds. It was this knowledge and power the Norns have, more powerful than any other, to affect the destiny of all who inhabit the Nine Worlds, that He longed for, needed in order to secure His position as King. In order to attempt halting Ragnarok.
He does not shy from the difficult things.
In making of Himself a sacrifice, His blood and will flowed down into Urd’s Well, feeding the Tree, allowing Himself to flow through root and limb. He became part of the Tree in this, I believe, and a key unto Himself to travel all of the worlds. There would be no place could bar Him, because He was now part of all places on the Tree. He could not keep Himself from Himself. This also allowed for even more knowledge to be attained, as we know He loves to don His masks, befriending those He meets, discovering their secrets, since His travels would now take Him anywhere He wished.
As ruthless as He can be to gain knowledge, He does not keep it to Himself, He shared the knowledge of the Runes with the other Aesir, and we now know Them as well. I feel like He wants us to know as much as we possibly can, knowledge from those who teach, books, and experience can only help to widen our perception of the world, our acceptance of such varied things and beliefs and behaviours, to continue becoming better than we are. And yes, of better use to Him, if we are called to Him. But generally, to be of better use to any God, Spirit, or Ancestor, and the rest of our own human society, our communities.
When we share our own insights and wisdoms, the pool deepens for others, if not to expand upon, then to enjoy and share with another who may yet bring it to new depths.