In cases in which good or evil thoughts are projected at individuals, those
thoughts, if they are to directly fulfil their mission, must find, in the aura
of the object to whom they are sent, materials capable of responding
sympathetically to their vibrations. Any combination of matter can only vibrate
within certain definite limits, and if the thought-form be outside all the
limits within which the aura is capable of vibrating, it cannot affect that aura
at all. It consequently rebounds from it, and that with a force proportionate to
the energy with which it impinged upon it. This is why it is said that a pure
heart and mind are the best protectors against any inimical assaults, for such a
pure heart and mind will construct an astral and a mental body of fine and
subtle materials, and these bodies cannot respond to vibrations that demand
coarse and dense matter. If an evil thought, projected with malefic intent,
strikes such a body, it can only rebound from it, and it is flung back with all
its own energy; it then flies backward along the magnetic line of least
resistance, that which it has just traversed, and strikes its projector; he,
having matter in his astral and mental bodies similar to that of the
thought-form he generated, is thrown into respondent vibrations, and suffers the
destructive effects he had intended to cause to another. Thus "curses [and
blessings] come home to roost." From this arise also the very serious effects of
hating or suspecting a good and highly-advanced man; the thought-forms sent
against him cannot injure him, and they rebound against their projectors,
shattering them mentally, morally, or physically. Several such instances are
well known to members of the Theosophical Society, having come under their
direct observation. So long as any of the coarser kinds of matter connected with
evil and selfish thoughts remain in a person's body, he is open to attack from
those who wish him evil, but when he has perfectly eliminated these by
self-purification his haters cannot injure him, and he goes on calmly and
peacefully amid all the darts of their malice. But it is bad for those who shoot
out such darts.