124 SKETCHES OF GREAT TEUTHS the causal body more and more developed. When it is developed to its highest extent, that man becomes an Adept. In the Textbook of Theosophy to which I have previously referred, the causal body is very clearly described. Indeed it is difficult to write of the constitution of man in a short article such as this with any clearness^ for there is so much to be said and so much that one must inevitably leave out. I would however remind you that these short articles are only meant to bring certain facts before you hoping that further study will be prompted from yourselves. A very interesting branch of the subject is the study of the power of thought on our own bodies and on those of other people. Every thought of a definite character such as a thought of affection or hatred, of devotion or suspicion, of anger or fear, of pride or delusion, not only creates a form but also radiates an undula- tion. This radiation travels in all directions and may contact another mental body in a passive or receptive condition and communicate to it something of its own vibrations. In ordinary speech we call this u catching another's thought". This process goes on all the world over, and will continue to do so until we have