In the esoteric sciences, a “materialist” is one who only believes in
what his five senses can tell him, thus he relies exclusively on the
data of the sensory, third dimensional world. This type of person has
no understanding of the superior senses or the superior dimensions, and
thus is limited to what he can perceive physically. As C.W. Leadbeter
said, “It is one of the commonest of mistakes to consider that the
limit of our power of perception is also the limit of all there is to
see.”