Note b — BOOK II.
Reading edition
Every thing that is moved, must of Necessity be moved by something else; and that thing is moved by something that is moved either by another Thing, or not by another Thing. If it be moved by that which is moved by another, we must of Necessity come to some prime Mover, that is not moved by another. For it is impossible, that what moveth, and is moved by another, should proceed in infinitum. Aristot. Phys. l. 8. c. 5.
Solum quod seipsum movet, quia nunquam deseritur à se, nunquam ne moveri quidem definit; quinetiam cæteris quæ moventur, hic fons: hoc principium est movendi. Principii autem nulla est origo: nam ex principio oriuntur omnia; ipsum autem nullâ ex re aliâ nasciepotest: nec enim esset id principium, quod gigneretur aliunde. Cicer. Tusc. Quest. l. 1. c. 23.
Cogitemus qui fieri possit, ut tanta magnitudo, ab aliquâ possit naturâ, tanto tempore circumferri? Ego igitur assero Deum causam esse, nec aliter posse fieri. Plato in Epinom.