It is not possible or desirable to attempt to make a sudden and thorough change with such pupils, even if they should show the best intentions and docility.

You should select a light, easy piece of salon music, but of a nature well adapted to the piano, which shall not be wearisome to the pupil, and in the improved performance of which he will take pleasure.

But, if you still find that he falls into the old, faulty manner of playing, and that the recently acquired technique, which has not yet become habitual, is endangered by it, lay this too aside, and take instead some appropriate etude, or perhaps a little prelude by Bach.

If, in the place of these, you choose for instruction a ponderous sonata, in which the music would distract the attention of the pupil from the improved technique, you give up the most important aim of your instruction, and occupy yourself with secondary matters; you will censure and instruct in vain, and will never attain success.

You must consider, reflect, and give your mind to the peculiar needs of the pupil, and you must teach in accordance with the laws of psychology.