In some cases we are even said to be, by an act of attention, made conscious of a feeling of which we should otherwise have {231} been unconscious: and there is much difference of opinion as to what it is which really occurs in this case. The point has received some consideration in a former Note, but there may be advantage in again recalling it to remembrance. It frequently happens (examples of it are abundant in the Analysis) that certain of our sensations, or certain parts of the series of our thoughts, not being sufficiently pleasurable or painful to compel attention, and there being no motive for attending to them voluntarily, pass off without having been attended to; and, not having received that artificial intensification, they are too slight and too fugitive to be remembered. We often have evidence that these sensations or ideas have been in the mind; because, during their short passage, they have called up other ideas by association. A good example is the case of reading from a book, when we must have perceived and recognized the visible letters and syllables, yet we retain a remembrance only of the sense which they conveyed. In such cases many psychologists think that the impressions have passed through the mind without our being conscious of them. But to have feelings unconsciously, to have had them without being aware, is something like a contradiction. All we really know is that we do not remember having had them; whence we reasonably conclude that if we had them, we did not attend to them; and this inattention to our feelings is what seems to be here meant by being unconscious of them. Either we had the sensations or other feelings without attending to them, and therefore immediately forgot them, or we never, in reality, had them. This last has been the opinion of some of the profoundest psychologists. Even in cases in which it is certain that we once had these feelings, and had them with a lively consciousness (as of the letters and syllables when we were only learning to read) yet when through numberless repetitions the process has become so rapid that we no longer remember having those visual sensations, these philosophers think that they are elided,--that we cease to have them at all. The usual impressions are made on our organs by the written characters, and are transmitted to the brain, but these organic states, {232} they think, pass away without having had time to excite the sensations corresponding to them, the chain of association being kept up by the organic states without need of the sensations. This was apparently the opinion of Hartley; and is distinctly that of Mr. Herbert Spencer. The conflicting suppositions are both consistent with the known facts of our mental nature. Which of them is the true, our present knowledge does not, I think, enable us to decide.