E4P73D
Demonstration — Part IV
Latin
Homo qui ratione ducitur, non ducitur metu ad obtemperandum (per propositionem 63 hujus) sed quatenus suum esse ex rationis dictamine conservare conatur hoc est (per scholium propositionis 66 hujus) quatenus libere vivere conatur, communis vitæ et utilitatis rationem tenere (per propositionem 37 hujus) et consequenter (ut in scholio II propositionis 37 hujus ostendimus) ex communi civitatis decreto vivere cupit. Cupit ergo homo qui ratione ducitur, ut liberius vivat, communia civitatis jura tenere. Q.E.D.
English (Elwes 1883)
The man, who is guided by reason, does not obey through fear (IV. lxiii.): but, in so far as he endeavours to preserve his being according to the dictates of reason, that is (IV. lxvi. note), in so far as he endeavours to live in freedom, he desires to order his life according to the general good (IV. xxxvii.), and, consequently (as we showed in IV. xxxvii. note. ii.), to live according to the laws of his country. Therefore the free man, in order to enjoy greater freedom, desires to possess the general rights of citizenship. Q.E.D.
Modern English
A person guided by reason is not moved by fear to obey (E4P63), but insofar as they strive by the dictate of reason to preserve their being — that is (E4P66S), insofar as they strive to live freely — they are moved to seek the common good and act by the principle of shared utility (E4P37), and consequently (E4P37S2) to desire to live according to the common law of the state. Therefore a person guided by reason desires, in order to live more freely, to maintain the common rights of citizenship. Q.E.D.