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Abortion, xiv Accident: cannot be without a subject, 3, 31; does not pass from one subject to another, 59, 78; everything which is accidentally can be traced to something which is per se, 7; not properly said to be made, 12; accidents as only active principles found in nature, 70; proper to the individual, 63; supposition that all forms are accidents, 59; transmitted only through transmission of its subject, 115 Accidental causality. See Causality Act: action is twofold, 136; diversity of action indicates diversity of nature, 105; eduction from potency to act, 32, 34, 63, 69–70, 73–75, 85, 112, 156–57, 160; God is pure act, 6, 8, 39; immanent vs. transitive, 20n13, 136–37; as a natural thing acts by its form so does a craftsman act by his intellect and will, 151, 166; natural thing is in act by virtue of its form, 8; nothing acts beyond its own species, 70, 85, 106–7; order of act is according to the order of nature, 109; prime matter not in act, 6; the proper act comes to be in proper matter , 98; that alone acts by its whole self which is wholly in act, 30; thing generated is in act through its own form, 8, 72; insofar as a thing is actual it is good, 47; insofar as a thing is evil it is not actual, 47; thing is related to operation and action as it is related to being , 84, 107–8, 113; the will is master of its own act, 56. See also Agent Adam, 79, 86, 95 Adequation, 151, 153, 170 Adultery, 82, 94 Age: meaning of word, 169 Agent: the action of every agent presupposes the first agent, 43; every agent acts by virtue of form, 79; every agent acts insofar as it is good, 47; every agent acts insofar as it is in act, 5, 7, 30, 36, 47, 73, 105, 144; every agent acts insofar as it is perfect, 47; every agent produces its like, 5, 8, 36, 44, 47, 79, 83, 85, 131, 136, 166; first agent acts through his own essence, 134; impossible for action of one agent to terminate in thing’s form and action of another agent to terminate in thing’s matter, 72, 81; a made thing must be like the agent, 25; natural agent acts by moving something, 8; natural agent causes both accidental and substantial form, 112; natural agent requires matter , 8; natural vs. voluntary, 124–25, 129, 166; only an agent whose action is its very substance requires no recipient matter when it makes a thing, 31; and patient, 20, 27, 35, 85; perfection of, 137; the thing made attains a certain relation to the agent, 20; univocal vs. non-univocal, 70n17 Air, 12, 22, 51, 65, 97, 118 Alteration, See Change Angels: and bodies, 182–83; characteristics of, 56, 66, 71, 86, 96, 99, 102; creation of, vii, xv, 33, 94, 171–84; division of, 27; vs. human souls, 102, 149; knowledge of, 26, 32, 34, 144, 173–74, 177, 179–80; vs. matter, 135; as mediators of creation, 24, 29, 153; as part of universe, 176 Anger, 113 Animal spirits, 112 Animals: annulose, 114–15, 117–18; brute, 70, 104, 110–11; perfect vs. imperfect , 76, 106, 112, 118 Appetite, 49, 96, 101, 108, 111, 113, 138 Arians, 120 Arrow, 135 Art, 48, 57, 62, 64, 113–14, 117, 129, 131 Axe, 62, 64 Beginning: of being, 21, 68; of duration vs. of magnitude, 158; of duration vs. of origin, 130; of institution vs. in time, 124 Being: active forms received in matter receive being which has certain limits and is individuated to that matter, 61; vs. becoming, 13, 62, 73–74; a being vs. its being, 121–22; is by creation, 30; convertible with truth, 160; creation terminates in, 36, 153; is the first of all effects, 29, 36, 77; form is the principle of, 71, 145, 153; God continually infuses, 130; of God is not measured temporally, 168; is good, 46, 141; 193 Index of Subjects 194 Index of Subjects Being (cont.) infinite distance between being and non-being, 3, 10, 27, 32; multitude is caused by, 150; nature of a being, 50; nature of being, 23, 46; and nonbeing , 10, 30–31, 130, 150, 163; is not univocally predicated of natural form and of the thing generated, 73; that which is per se is prior to that which is through another, 7, 38, 134–35; of thing in...

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