We cast our own shadow of delusion.
We shed our own light of wisdom.
From http://www.psychologytoday.com/blog/hide-and-seek/201204/jung-the-man-and-his-symbols:
‘… Jung had a dream in which he was making painful headway through dense fog, with a tiny light in the cup of his hands and a gigantic black figure chasing after him. When he awoke he realized that the black figure was his own shadow, brought into being by the light that he was carrying:
“… this light was my consciousness,
the only light that I have.
My own understanding is
the sole treasure I possess,
and the greatest.”