This power in the soul is an intelligence.
This intelligence is distinct from our ordinary mind; it's what Gurdjieff would call a conscious intelligence, because—unlike our ordinary intelligence—it can become aware of God.
I think we can all agree that to become aware of God is to cross an invisible line, from belief (which is where we think from) to understanding— which consists of certainty.
So until we are certain of God— to taste is to have actual experience, not a set of theories— we do not have this intellect, this intelligence, of which Eckhart speaks. And as we are, we cannot and do not become aware of God. (Not too many of us bop around from moment to moment in our lives, saying to ourselves, "Oh, yeah. I'm so aware of God now.")
I'll say more on this later.