“Among all the realities of the invisible world, mediated to us by the disclosures and promises of God, and to which our faith responds, there is none that more strongly calls into action this faculty for grasping the unseen than the divine pronouncement through the Gospel, that, though sinners, we are righteous in the judgment of God. That is not only the invisible, it seems the impossible; it is the paradox of all paradoxes; it requires a unique energy of believing; it is the supreme victory of faith over the apparent reality of things; it credits God with calling the things that are not as though they were; it penetrates more deeply into the deity of God than any other act of faith.”
—Geerhardus Vos, Grace and Glory: Sermons Preached in the Chapel of Princeton Theological Seminary (Solid Ground, 2007), p. 135.
Tony Reinke 
it penetrates more deeply into the deity of God than any other act of faith.
That is awesome.
And when we don’t/can’t/won’t grasp the amazing truth of justification it seems as though we are saying “You’re not God.” Because who could declare us just except God; and who could be our justifier except for God?
And it seems when we humbly receive the declaration of God as just we are recognizing and proclaiming “You are God.”