There was a young man who said "God,
to you it must seem very odd
that a tree as a tree
simply ceases to be
when there's no one about in the quad."
God answers:
"Young man, your astonishment's odd,
I'm always about in the quad
and that's why the tree
never ceases to be
as observed, by yours faithfully, God.

From "The Miracle of Existence"