rom impurity, from irritability or from
fear.

An interesting branch of the subject is the study of the various shapes and
colours taken by thought-forms of different kinds. The colours indicate the
nature of the thought, and are in agreement with those which we have
already described as existing in the bodies. The shapes are of infinite
variety, but are often in some way typical of the kind of thought which
they express.

Every thought of definite character, such as a thought of affection or
hatred, of devotion or suspicion, of anger or fear, of pride or jealousy,
not only creates a form but also radiates an undulation. The fact that,
each one of these thoughts is expressed by a certain colour indicates that
the thought expresses itself as an oscillation of the matter of a certain
part of the mental body. This rate of oscillation communicates itself to
the surrounding mental matter precisely in the same way as the vibration of
a bell communicates itself to the surrounding air.

This radiation travels out in all directions, and whenever it impinges upon
another mental body in a passive or receptive condition it communicates to
it something of its own vibration. This does not convey a definite complete
idea, as does the thought-form, but it tends to produce a thought of the
same character as itself. For example, if the thought be devotional its
undulations will excite devotion, but the object of the worship may be
different in the case of each person upon whose mental body they impinge.
The thought-form, on the other hand, can reach only one person, but will
convey to that person (if receptive) not only a general devotional feeling,
but also a precise image of the Being for whom the adoration was originally
felt.

Any person who habitually thinks pure, good and strong thoughts is
utilizing for that purpose the higher part of his mental body--a part which
is not used at all by the ordinary man, and is entirely undeveloped in him.
Such an one is therefore a power for good in the world, and is being of
great use to all those of his neighbours who are capable of any sort of
response. For the vibration which he sends out tends to arouse a new and
higher part of their mental bodies, and consequently to open before them
altogether new fields of thought.

It may not be exactly the same thought as that sent out, but it is of the
same nature. The undulations generated by a man thinking of Theosophy do
not necessarily communic