E4P37D2
Demonstration — Part IV
Latin
Bonum quod homo sibi appetit et amat, constantius amabit si viderit alios idem amare (per propositionem 31 partis III) atque adeo (per corollarium ejusdem propositionis) conabitur ut reliqui idem ament et quia hoc bonum (per propositionem præcedentem) omnibus commune est eoque omnes gaudere possunt, conabitur ergo (per eandem rationem) ut omnes eodem gaudeant et (per propositionem 37 partis III) eo magis quo hoc bono magis fruetur. Q.E.D.
English (Elwes 1883)
(not aligned in this witness)
Modern English
A good that a person seeks and loves for himself, he will love more steadily if he sees that others love it as well (E3P31). He will therefore strive to bring it about that others love it too. And since this good (E4P36) is common to all and all can rejoice in it, he will strive for the same reason to bring it about that all rejoice in it — and the more so (E3P37) in proportion as his own enjoyment of this good is greater. Q.E.D.