Carl Jung's "Thanks Offering"

In remembrance of his seventy-fifth birthday Jung chiseled a twenty-inch square stone with three alchemical inscriptions ”as a thanks offering."
The stone stands outside the tower at Bollingen "and is like an explanation of it." Claire Dunne, Wounded Healer of the Soul, Page 140.

Here stands the mean, uncomely stone,
’Tis very cheap in price!
The more it is despised by fools,
The more loved by the wise. Carl Jung, “Wehr,” Page 377.