We have seen that, beside the names of particular species of motions, as walking, running, flying, there was occasion for a general name which might include {157} the whole of those motions. For this purpose, the names Action and Acting were employed. It is now to be remembered, that those sensations which we mark by the names of action, as walking, running, &c., are but part of the sensations which we derive from objects; that we have other sensations, and clusters of sensations, from them, on account of which we apply to them other names; as when we call a man tall, on account of certain sensations; dark, on account of certain other sensations, and so on. Now, as we had occasion for a name to include the separate clusters, called walking, running, flying, rolling, falling, and so on, and for that purpose adopted the name Acting; so, having from objects other sensations than those marked by the word acting, we have occasion for a name which shall include both those sensations, and those comprehended in the word acting along with them: in short, a word that shall embrace all sensations, of whatever kind, which any object is capable of exciting in us. This purpose is effected by the word affirmative of Existence. When we affirm of any thing that it EXISTS, that it IS: what we mean, is, that we may have sensations from it; nothing, without ourselves, being known to us, or capable of being known, but through the medium of our senses. There is the same occasion for making the Substantive Verb connote the three distinctions of TIME PAST, TIME PRESENT, and TIME FUTURE, as in the case of other verbs; also to connote the distinctions of PERSONS and NUMBERS; and, lastly, to connote the THREE MODES, that in which there is no reference to any thing preceding, that in which there is a reference to something preceding, and that in which reference {158} is made to the will of one of the PERSONS. Accordingly the Substantive Verb has TENSES, MOODS, NUMBERS, and PERSONS, like any other verb. Such is the nature and object of the Substantive Verb. It is the most GENERICAL of all the words, which we have characterized, as marks upon marks. These are the words usually called ATTRIBUTIVES. According to the view which we have given of them, they may be more appropriately denominated, SECONDARY MARKS. The names of the larger classes, as tree, horse, strength, we may call PRIMARY MARKS. The subsidiary names by which smaller classes are marked out of the larger; as when we say, tall tree, great strength, running horse, walking man; that is, all attributives, or marks applied upon marks; we may call SECONDARY MARKS. {159} SECTION IV. PREDICATION.