A sacred space is a place where you feel comfortable and protected. You are free from outside influences to meditate, pray, or just sit quietly and be.
A disciple suddenly discovered the richness of fecundity of emptiness -- the realization that everything is impermanent, unsatisfactory, and empty of self. In this mood of divine emptiness, he sat in joy under a tree, when suddenly flowers began to fall all around him.
And the angels whispered, "But I haven't uttered a word about emptiness."
"True," the angels replied. "You have not spoken of emptiness, we have not heard of emptiness. This is true emptiness." And the showers of blossoms continued to fall.