Among the predisposing causes for nervous breakdown none is more potent than the inability of the obsessive to adapt himself to change of plan, and to reconcile himself to criticism, opposition, and the various annoyances incident to his occupation. In dealing with others the following suggestion of Marcus Aurelius may come in play: "When a man has done thee any wrong, immediately consider with what opinion about good or evil he has done wrong. For when thou hast seen this, thou wilt pity him, and neither wonder nor be angry." Again, in this connection the lines of Cowper are pertinent: "The modest, sensible and well-bred man Will not affront me, and no other can." Pope, also, who is said not always to have followed his own good counsel, contributes a verse which may serve a turn: "At ev'ry trifle scorn to take offense, That always shows great pride, or little sense." The practice of such commonplace philosophy (which, to be effective, should be ready for immediate use, not stored away for later reflection), together with training against faulty mental states studied in these pages, will go far toward relieving the mental perturbation that unfits for effective work, and contributes to "neurasthenia." During an hour's delay, caused by the failure of another to keep an appointment, I formulated the following maxim: "These are the annoyances incident to my business; to fret when they occur means that I cannot manage my business without friction." This may not appeal to the reader, but for me it has proved as good an hour's work as I ever did. Since that time, on the occurrence of similar sources of provocation, I have found it necessary to go no farther than "These are the annoyances," to restore the needful balance. When we allow our gorge to rise at ordinary sources of discomfort, it implies that we are prepared only for our affairs to run with perfect smoothness. This represents the insistent idea carried to an absurdity. At the risk of losing caste with the critical I cannot forbear sharing with the reader an inelegant maxim which has more than once prevented an access of rage upon the blunder of a subordinate: "If he had our brains he'd have our job." Spinoza says: "The powerlessness of man to govern and restrain his emotions I call servitude. For a man who is controlled by his emotions is not his own master but is mastered by fortune, under whose power he is often compelled, though he sees the better, to follow the worse." The same philosopher in counselling self-restraint adds: "The mind's power over the emotions consists, first, in the actual knowledge of the emotions." Again: "An emotion which is a passion ceases to be a passion as soon as we form a clear and distinct idea of it." The meaning of this dictum I first realized on experiencing the magical effect of the line of thought suggested by the delayed appointment. * * * * *