Visualization must, of course, be directed by the will; we are to visualize exactly what we want; we must be careful not to let the imagination run riot. Imagination is a good servant but a poor master, and unless it is controlled it may easily lead us into all kinds of speculations and conclusions which have no basis or foundation in fact whatever. Every kind of plausible opinion is liable to be accepted without any analytical examination and the inevitable result is mental chaos.
