"It is clear that a man’s duty with regard to himself is to develop all his different vehicles as far as possible, in order to make them finished instruments for the use of the soul. There is a still higher stage in which that soul itself is being trained to be a fit instrument in the hands of the Deity, a perfect channel for the divine grace; but the first step towards this high aim is that the soul itself shall learn thoroughly to control the lower bodies, so that there shall be in them no thought or feeling except those which the soul allows."