Theory:

A slumber did my spirit seal—
I had no human fears.
She seemed a thing that could not feel
The touch of earthly years.
No motion has she now, no force—
She neither hears nor sees,
Rolled round in earth’s diurnal course
With rocks and stones and trees.
 
                             ~ William Wordsworth
Reference:
National Council of Educational Research and Training (2006). Beehive. A Slumber did my Spirit Seal - William Wordsworth (pp.136-137). Published at the Publication Division by the Secretary, National Council of Educational Research and Training, Sri Aurobindo Marg, New Delhi.