As is the case with all other psychological constructions, so is it with those concepts: no rigorous definitions are possible; and consequently the one cannot be deduced from the other and they cannot be connected in a system, as has, nevertheless, often been attempted, at great waste of time and without result. But it can be claimed as possible to obtain, apart from philosophical definitions recognised as impossible, empirical definitions, universally acceptable as true. Since there does not exist a unique definition of a given fact, but innumerable definitions can be given of it, according to the cases and the objects for which they are made, so it is clear that if there were only one, and that the true one, this would no longer be an empirical, but a rigorous and philosophical definition. Speaking exactly, every time that one of the terms to which we have referred has been employed, or any other of the innumerable series, a definition of it has at the same time been given, expressed or understood. And each one of these definitions has differed somewhat from the others, in some particular, perhaps of very small importance, such as tacit reference to some individual fact or other, which thus became especially an object of attention and was raised to the position of a general type. So it happens that not one of such definitions satisfies him who hears it, nor does it satisfy even him who constructs it. For, the moment after, this same individual finds himself face to face with a new case, for which he recognizes that his definition is more or less insufficient, ill-adapted, and in need of remodelling. It is necessary, therefore, to leave writers and speakers free to define the sublime or the comic, the tragic or the humoristic, on every occasion, as they please and as may seem suitable to their purpose. And if you insist upon obtaining an empirical definition of universal validity, we can but submit this one:--The sublime (comic, tragic, humoristic, etc.) is _everything_ that is or will be so _called_ by those who have employed or shall employ this _word_. [Sidenote] _Examples: definitions of the sublime, the comic, and the humoristic._