The troubles connected with the nervous system are more frequent than those attacking the brain, such as insanity and disruption of the brain tissue. Almost all who undertake meditation are conscious of an effect in [105] the nervous system; sometimes it takes the form of sleeplessness, of excitability, of a strained energy and restlessness that permit of no relaxation; of an irritability that has been foreign perhaps to the disposition until meditation was pursued; of a nervous reaction - such as a twitching of the limbs, the fingers or the eyes - of depression or a lowering of the vitality, and of many individual modes of showing tension and nervousness, differing according to nature and temperament. This display of nervousness may be either severe or slight, but I seek earnestly to point out it is quite needless, provided the student adheres to the rules of common sense, that he studies wisely his own temperament, and that he does not blindly proceed with forms and methods but insists on knowing the raison d'être of instituted action. If occult students disciplined the life more wisely, if they studied the food problem more carefully, if they took the needed hours of sleep with more determination, and if they worked with cautious slowness and not so much from impulse (no matter how high the aspiration) greater results would be seen and the Great Ones would have more efficient helpers in the work of serving the world.