"Not only does a man generate and send forth his own thought-forms, but he also serves as a magnet to draw towards himself the thought-forms of others from the astral plane around him, of the classes to which his own ensouled thought-forms belong. He may thus attract to himself large reinforcements of energy from outside, and it lies within himself whether these forces that he draws into his own being from the external world shall be of a good or of an evil kind."