From Valfather’s pledge.

Understand ye yet, or what?

This myth was given in connection with Ygdrasil, but it is repeated here to shed a ray of light upon the character of Odin, and in this wise Mimer is brought into a clearer sunlight also.

In regard to Odin’s speaking with Mimer’s head, we have the following passage in the lay of Sigdrifa:

On the rock he[[40]] stood

With edged sword,

A helm on his head he bore.

Then spake Mimer’s head

Its first wise word,

And true sayings uttered.