green fly and other things

"… the thought of man upon being evolved passes into the inner world,
and becomes an active entity by associating itself, coalescing we might
term it, with an elemental - that is to say, with one of the
semi-intelligent forces of the kingdoms. It survives as an
active intelligence - a creature of the mind's begetting - for a
longer or shorter period proportionate with the original intensity of the
cerebral action which generated it. Thus a good thought is perpetuated as
an active, beneficient power, an evil one as a maleficient demon. And so
man is continually peopling his current in space with a world of his own,
crowded with the offspring of his fancies, desires, impulses, passions…
which reacts upon any sensitive or nervous organisations which comes in
contact with it, in proportion to its dynamic energy.