his life as an ego--such, for example, as pride, irritability, sensuality.
These, like the rest, are reducible to vibrations, but they are in all
cases vibrations of the lower subdivisions of their respective worlds, and
therefore they cannot reproduce themselves in the causal body, which is
built exclusively of the matter of the three higher subdivisions of its
world. For each section of the astral body acts strongly upon the
corresponding section of the mental body, but only upon the corresponding
section; it cannot influence any other part. So the causal body can be
affected only by the three higher portions of the astral body; and the
oscillations of those represent only good qualities.

The practical effect of this is that the man can build into the ego (that
is, into his true self) nothing but good qualities; the evil qualities
which he develops are in their nature transitory and must be thrown aside
as he advances, because he has no longer within him matter which can
express them. The difference between the causal bodies of the savage and
the saint is that the first is empty and colourless, while the second is
full of brilliant, coruscating tints. As the man passes beyond even
saint-hood and becomes a great spiritual power, his causal body increases
in size, because it has so much more to express, and it also begins to pour
out from itself in all directions powerful rays of living light. In one who
has attained Adeptship this body is of enormous dimensions.

The mental body is built of matter of the four lower subdivisions of the
mental world, and expresses the concrete thoughts of the man. Here also we
find the same colour-scheme as in the causal body. The hues are somewhat
less delicate, and we notice one or two additions. For example, a thought
of pride shows itself as orange, while irritability is manifested by a
brilliant scarlet. We may see here sometimes the bright brown of avarice,
the grey-brown of selfishness, and the grey-green of deceit. Here also we