The quality of observation comprises various minor qualities, such as _patience_. In comparison with the scientist, the untrained person not only appears to be a blind man who can see neither with the naked eye nor with the help of lenses; he appears as an "impatient" person. If the astronomer has not already got his telescope in focus, the layman cannot wait until he has done so; while the scientist would be performing this task without even perceiving that he was carrying out a long and patient process, the layman would be fuming, and thinking, in great perturbation: "What am I doing here? I cannot waste time like this." When microscopists expect visits from a lay public, they prepare a long row of microscopes already in focus, because they know that their visitors will wish to see "at once" and "quickly," and that they will wish to see "a great deal." We can easily imagine a scientist whose contributions to the work of the laboratory are of the highest order, who holds chairs and possesses civil dignities and honors of every sort, amiably consenting to show a lady a cellular tissue under the microscope. As if it were the most natural thing in the world, he would proceed as follows, with solemn and serene gravity. He would cut off a minute portion of a piece of tissue preserved in spirit, and would carefully clean the slide on which the subject was to be placed and the slide that was to cover it; he would clean again the lenses of the microscope, focus the preparation, and make ready to explain. But undoubtedly the lady all this time will have been on the point of saying a hundred times: "Excuse me, Professor, but really ... I have an engagement ... I have a great deal to do...." When she has looked without seeing anything, her lamentations are bitter: "What a lot of time I have wasted!" And yet she has nothing to do, and fritters away all her time! What she lacks is not time but patience. He who is impatient cannot appraise things properly; he can only appreciate his own impulses and his own satisfactions. He reckons time solely by his own activity. That which satisfies him may be absolutely empty, valueless, nugatory; no matter, its value lies in the satisfaction it gives him; and if it gives him satisfaction, it cannot be said to be a waste of time. But what he cannot endure, and what impresses him as a loss of time is a tension of the nerves, a moment of self-control, an interval of waiting without an immediate result There is, indeed, a popular Italian proverb: _aspettare e non venire e una cosa da morire_ (to wait for what does not come is a killing business). These impatient persons are like those busybodies who always make off when there is really work to be done.