If the views of common sense on this question were formulated, which, for the most part, they are not, they would be something like this. Until we begin to think the facts which we know directly are all muddled together and confused: first of all it is necessary to sort them by picking out qualities from the general confusion in which they are at first concealed. It is possible that during this process, which is what is called analysis, we may be obliged, at first, to overlook some of what we already know in a vague sort of way, but this insignificant loss is compensated by the clarity of what remains, and is, in any case, only temporary. For as the analysis proceeds we gradually replace the whole of the original mere muddle by clear and definite things and qualities. At first we may be able to distinguish only a few qualities here and there, and our preoccupation with these may possibly lead us, for a time, to pay insufficient attention to the rest of the muddle which we know directly but have not yet succeeded in analysing. But when the analysis is completed the distinct things and qualities which we shall then know will contain _all_ that we originally knew, and more besides, since the analysis will have revealed much that was originally concealed or only implicit in the original unanalysed fact. If, for instance, you look at a very modern painting, at first what you are directly aware of may be little more than a confused sight: bye and bye, as you go on looking, you will be able to distinguish colours and shapes, one by one objects may be recognised until finally you may be able to see the whole picture at a glance as composed of four or five different colours arranged in definite shapes and positions. You may even be able to make out that it represents a human figure, or a landscape. Common sense would tell you that if your analysis is complete these colours and shapes will exhaust the whole of what you originally knew and moreover that in the course of it much will have been discovered which originally you could hardly be said to have known at all, so that analysis, far from limiting your direct knowledge, will have added to it considerably. Starting, then, originally, from a very meagre stock of direct knowledge, analysis, according to the common sense view, by discovering more and more qualities, builds up for us more and more direct knowledge.