their worldly unpractically shows itself mostly in their inability to distinguish between great and small. They solve all difficult questions which have a more or less social character (emigration, for instance) by getting up subscriptions, but not by the method of scientific investigation and experiment, though this is at their full disposal, and, above all, corresponds to their vocation. They readily become house-doctors, assistant house-doctors, clinical assistants, or consulting doctors, and they are prepared to keep these positions until they are forty, though independence, a sense of freedom, and personal initiative are quite as necessary in science, as, for instance, in art or commerce. I have pupils and listeners, but I have no helpers or successors. Therefore I love them and am concerned for them, but I'm not proud of them . . . and so on.
However great the number of such defects may be, it's only in a cowardly and timid person that they give rise to pessimism and distraction. All of them are by nature accidental and transitory, and are completely dependent on the conditions of life. Ten years will be enough for them to disappear or give place to new and different defects, which are quite indispensable, but will in their turn give the timid a fright. Students' shortcomings often annoy me, but the annoyance is nothing in comparison with the joy I have had these thirty years in speaking with my pupils, lecturing to them, studying their
