if it was given to them as a Grace and not earned?
Adam was not justified, yet. He did not attain glory, yet. He was on a standing that would have attained glory if he obeyed, or would fall from attaining glory if he disobeyed.
He was not perfected, yet. He was innocent, he was undefiled, but he did not reach perfection. He fell into sin before he could.
Jesus is the 'Adam' that attained glory, that attained eternal bliss, that attained the perfect standing for all of us who belong to him.
Whereas Adam fell from glory, we all fell short of it too. But as Christ attained glory, we all in him obtained the same.