To exist in a thought, Is to exist nonetheless. To exist nonetheless, One must exist all the same. But to exist in a thought, Requires a being to think. And, for a being to think, For that thought to be thought. Requires a level of existence, That must not be sought. But rather exist, On a nominal plane. In a place and a time, That cannot be named. But there it remains, This level of existence, That permits the persistence of others existence.
My try at a little more fun structure, courtesy of Dr. Seuss