Put briefly, these restrictions are that there shall be no prying, no selfish use of the power, and no displaying of phenomena. That is to say, that the same considerations which would govern the actions of a man of right feeling upon the physical plane are expected to apply upon the astral and mental planes also; that the pupil is never under any circumstances to use the power which his additional knowledge gives to him in order to promote his own worldly advantage, or indeed in connection with gain in any way; and that he is never to give what is called in spiritualistic circles "a test"--that is, to do anything which will incontestably prove to sceptics on the physical plane that he possesses what to them would appear to be an abnormal power. With regard to this latter proviso people often say, "But why should he not? it would be so easy to confute and convince your sceptic, and it would do him good!" Such critics lose sight of the fact that, in the first place, none of those who know anything _want_ to confute or convince sceptics, or trouble themselves in the slightest degree about the sceptic's attitude one way or the other; and in the second, they fail to understand how much better it is for that sceptic that he should gradually grow into an intellectual appreciation of the facts of nature, instead of being suddenly introduced to them by a knock-down blow, as it were. But the subject was fully considered many years ago in Mr. Sinnet's _Occult World_, and it is needless to repeat again the arguments there adduced. It is very hard for some of our friends to realize that the silly gossip and idle curiosity which so entirely fill the lives of the brainless majority on earth can have no place in the more real life of the disciple; and so they sometimes enquire whether, even without any special wish to see, a clairvoyant might not casually observe some secret which another person was trying to keep, in the same way as one's glance might casually fall upon a sentence in someone else's letter which happened to be lying open upon the table. Of course he might, but what if he did? The man of honour would at once avert his eyes, in one case as in the other, and it would be as though he had not seen. If objectors could but grasp the idea that no pupil _cares_ about other people's business, except when it comes within his province to try to help them, and that he has always a world of work of his own to attend to, they would not be so hopelessly far from understanding the facts of the wider life of the trained clairvoyant.