The world has come to see that historically, Adam and Eve, as described in the Bible did not exist. Therefore, we should regard Mary's feast on the eighth of December as celebrating her through and through goodness.
You are fortunate if you have known a sinless child, or more rarely, a sinless adult, whose presence lifts you above the world's dirtiness. Mary is like that. When you close your eyes, saying, "Hail Mary, full of grace," she wraps you in her mantle of sinlessness.