E2P44S
Scholium — Part II
Latin
Qua autem ratione hoc fiat paucis explicabo. Ostendimus supra (propositione 17 hujus cum ejus corollario) mentem, quamvis res non existant, eas tamen semper ut sibi præsentes imaginari nisi causæ occurrant quæ earum præsentem existentiam secludant. Deinde (propositione 18 hujus) ostendimus quod si corpus humanum semel a duobus corporibus externis simul affectum fuit, ubi mens postea eorum alterutrum imaginabitur, statim et alterius recordabitur hoc est ambo ut sibi præsentia contemplabitur nisi causæ occurrant quæ eorum præsentem existentiam secludant. Præterea nemo dubitat quin etiam tempus imaginemur nempe ex eo quod corpora alia aliis tardius vel celerius vel æque celeriter moveri imaginemur. Ponamus itaque puerum qui heri prima vice hora matutina viderit Petrum, meridiana autem Paulum et vespertina Simeonem atque hodie iterum matutina hora Petrum. Ex propositione 18 hujus patet quod simulac matutinam lucem videt, illico solem eandem cæli quam die præcedenti viderit partem percurrentem sive diem integrum et simul cum tempore matutino Petrum, cum meridiano autem Paulum et cum vespertino Simeonem imaginabitur hoc est Pauli et Simeonis existentiam cum relatione ad futurum tempus imaginabitur et contra si hora vespertina Simeonem videat, Paulum et Petrum ad tempus præteritum referet, eosdem scilicet simul cum tempore præterito imaginando atque hæc eo constantius quo sæpius eos eodem hoc ordine viderit. Quod si aliquando contingat ut alia quadam vespera loco Simeonis Jacobum videat, tum sequenti mane cum tempore vespertino jam Simeonem jam Jacobum, non vero ambos simul imaginabitur. Nam alterutrum tantum, non autem ambos simul tempore vespertino vidisse supponitur. Fluctuabitur itaque ejus imaginatio et cum futuro tempore vespertino jam hunc jam illum imaginabitur hoc est neutrum certo sed utrumque contingenter futurum contemplabitur. Atque hæc imaginationis fluctuatio eadem erit si imaginatio rerum sit quas eodem modo cum relatione ad tempus præteritum vel præsens contemplamur et consequenter res tam ad tempus præsens quam ad præteritum vel futurum relatas ut contingentes imaginabimur.
English (Elwes 1883)
How this way of looking at things arises, I will briefly explain. We have shown above (II. xvii. and Coroll.) that the mind always regards things as present to itself, even though they be not in existence, until some causes arise which exclude their existence and presence. Further (II. xviii.), we showed that, if the human body has once been affected by two external bodies simultaneously, the mind, when it afterwards imagines one of the said external bodies, will straightway remember the other--that is, it will regard both as present to itself, unless there arise causes which exclude their existence and presence. Further, no one doubts that we imagine time, from the fact that we imagine bodies to be moved some more slowly than others, some more quickly, some at equal speed. Thus, let us suppose that a child yesterday saw Peter for the first time in the morning, Paul at noon, and Simon in the evening; then, that today he again sees Peter in the morning. It is evident, from II. Prop. xviii., that, as soon as he sees the morning light, he will imagine that the sun will traverse the same parts of the sky, as it did when he saw it on the preceding day; in other words, he will imagine a complete day, and, together with his imagination of the morning, he will imagine Peter; with noon, he will imagine Paul; and with evening, he will imagine Simon--that is, he will imagine the existence of Paul and Simon in relation to a future time; on the other hand, if he sees Simon in the evening, he will refer Peter and Paul to a past time, by imagining them simultaneously with the imagination of a past time. If it should at any time happen, that on some other evening the child should see James instead of Simon, he will, on the following morning, associate with his imagination of evening sometimes Simon, sometimes James, not both together: for the child is supposed to have seen, at evening, one or other of them, not both together. His imagination will therefore waver; and, with the imagination of future evenings, he will associate first one, then the other--that is, he will imagine them in the future, neither of them as certain, but both as contingent. This wavering of the imagination will be the same, if the imagination be concerned with things which we thus contemplate, standing in relation to time past or time present: consequently, we may imagine things as contingent, whether they be referred to time present, past, or future.
Modern English
I will explain briefly how this comes about. We showed above (E2P17) that the mind always imagines things as present to itself, even when they do not exist, unless causes arise that exclude their present existence. We also showed (E2P18) that if the human body has once been affected by two external bodies simultaneously, then afterward, whenever the mind imagines one of them, it will immediately recall the other, that is, it will regard both as present to itself, unless causes arise that exclude their present existence. No one doubts that we also imagine time, namely from the fact that we imagine some bodies moving more slowly, others more quickly, and others at equal speed.
Suppose, then, that a child yesterday saw Peter for the first time in the morning, Paul at noon, and Simon in the evening, and today sees Peter again in the morning. From (E2P18) it is clear that as soon as he sees the morning light, he will immediately imagine the sun traversing the same part of the sky as on the preceding day, that is, he will imagine the whole day, and together with the morning he will imagine Peter, with noon Paul, and with evening Simon. He will thus imagine the existence of Paul and Simon with reference to future time. Conversely, if he sees Simon in the evening, he will refer Peter and Paul to past time, imagining them together with the imagination of past time, and this more consistently the more often he has seen them in this same order.
If it should happen at some point that on some other evening he sees James instead of Simon, then the following morning he will associate evening-time sometimes with Simon, sometimes with James, but not both together — for he is supposed to have seen only one of them, not both, at evening time. His imagination will therefore waver, and with the imagination of future evenings he will picture now one, now the other, that is, he will regard neither as certain but both as contingent in the future. This wavering of the imagination will be the same if the imagination involves things we contemplate with reference to past or present time; and consequently we will imagine things referred to present, past, or future time as contingent.