In each performance (the performer being supposed in the same state of mental and bodily health), the tendency will be to repeat the immediately preceding performances more nearly than remoter ones. It is the common tendency of living beings to go on doing what they have been doing most recently. The last habit is the strongest. Hence, if he took great pains last time, he will play better now, and will take a like degree of pains, and play better still next time, and so go on improving while life and vigour last. If, on the other hand, he took less pains last time, he will play worse now, and be inclined to take little pains next time, and so gradually deteriorate. This, at least, is the common everyday experience of mankind.
So with painters, actors, and professional men of every description; after a little while the memory of many past performances strikes a sort of fused balance in the mind, which results in a general method of procedure with but little conscious memory of even the latest performances, and with none whatever of by far the greater number of the remoter ones.
Still, it is noteworthy, that the memory of some even of these will occasionally assert itself, so far as we can see, arbitrarily, the reason why this or that occasion should still haunt us, when others like them are forgotten, depending on some cause too subtle for our powers of observation.
Even with such a simple matter as our daily dressing and undressing, we may remember some few details of our yesterday’s toilet, but we retain nothing but a general and fused recollection of the many thousand earlier occasions on which we have dressed, or gone to bed. Men invariably put the same leg first into their trousers—this is the survival of memory in a residuum; but they cannot, till they actually put on a pair of trousers, remember which leg they do put in first; this is the rapid fading away of any small individual impression.
The seasons may serve as another illustration; we have a general recollection of the kind of weather which is seasonable for any month in a year; what flowers are due about what time, and whether the spring is on the whole backward or early; but we cannot remember the weather on any particular day a year ago, unless some unusual incident has impressed it upon our memory. We can remember, as a general rule, what kind of season it was, upon the whole, a year ago, or perhaps, even two years; but more than this, we rarely remember, except in such cases as the winter of 1854–1855, or the summer of 1868; the rest is all merged.
We observe, then, that as regards small and often repeated impressions, our tendency is to remember best, and in most detail, what we have been doing most recently, and what in general has occurred most recently, but that the earlier impressions though forgotten individually, are nevertheless, not wholly lost.
2. When we have done anything very often, and have got into the habit of doing it, we generally take the various steps in the same order; in many cases this seems to be a sine quâ non for our repetition of the action at all. Thus, there is probably no living man who could repeat the words of “God save the Queen” backwards, without much hesitation and many mistakes; so the musician and the singer must perform their pieces in the order of the notes as written, or at any rate as they ordinarily perform them; they cannot transpose bars or read them backwards, without being put out, nor would the audience recognise the impressions they have been accustomed to, unless these impressions are made in the accustomed order.
3. If, when we have once got well into the habit of doing anything in a certain way, some one shows us some other way of doing it, or some way which would in part modify our procedure, or if in our endeavours to improve, we have hit upon some new idea which seems likely to help us, and thus we vary our course, on the next occasion we remember this idea by reason of its novelty, but if we try to repeat it, we often find the residuum of our old memories pulling us so strongly into our old groove, that we have the greatest difficulty in repeating our performance in the new manner; there is a clashing of memories, a conflict, which if the idea is very new, and involves, so to speak, too sudden a cross—too wide a departure from our ordinary course—will sometimes render the performance monstrous, or baffle us altogether, the new memory failing to fuse harmoniously with the old. If the idea is not too widely different from our older ones, we can cross them with it, but with more or less difficulty, as a general rule in proportion to the amount of variation. The whole process of understanding a thing consists in this, and, so far as I can see at present, in this only.
Sometimes we repeat the new performance for a few times, in a way which shows that the fusion of memories is still in force; and then insensibly revert to the old, in which case the memory of the new soon fades away, leaving a residuum too feeble to contend against that of our many earlier memories of the same kind. If, however, the new way is obviously to our advantage, we make an effort to retain it, and gradually getting into the habit of using it, come to remember it by force of routine, as we originally remembered it by force of novelty. Even as regards our own discoveries, we do not always succeed in remembering our most improved and most striking performances, so as to be able to repeat them at will immediately: in any such performance we may have gone some way beyond our ordinary powers, owing to some unconscious action of the mind. The supreme effort has exhausted us, and we must rest on our oars a little, before we make further progress; or we may even fall back a little, before we make another leap in advance.
In this respect, almost every conceivable degree of variation is observable, according to differences of character and circumstances. Sometimes the new impression has to be made upon us many times from without, before the earlier strain of action is eliminated; in this case, there will long remain a tendency to revert to the earlier habit. Sometimes, after the impression has been once made, we repeat our old way two or three times, and then revert to the new, which gradually ousts the old; sometimes, on the other hand, a single impression, though involving considerable departure from our routine, makes its mark so deeply that we adopt the new at once, though not without difficulty, and repeat it in our next performance, and henceforward in all others; but those who vary their performance thus readily will show a tendency to vary subsequent performances according as they receive fresh ideas from others, or reason them out independently. They are men of genius.