"What
is expressed by the Tau is a driving force which can only be set in
motion by the power of selfless Love. It will be possible to use this
power to drive machines, which will, however, cease to function if
egotistical people make use of them.
It is perhaps known to
you that Keely invented a motor which would only go if he himself were
present. He was not deceiving people about this; for he had in him that
driving force orginating in the soul, which can set machines in motion.
A driving force which can only be moral, that is the idea of the
future; a most important force, with which culture must be inoculated,
if it is not to fall back on itself. The mechanical and the moral must
interpenetrate each other, because the mechancial is nothing without
the moral." [Rudolf Steiner, The Temple Legend - Freemasonry
& Related Occult Movements"]