There are ſome other things to be conſider’d firſt, in which it’s probable they have ſome relation to us. That the Planets have thoſe Elements of Earth, Air and Water, as well as we, I have already made not unlikely. Let us now ſee whether they may not have Fire alſo: which is not ſo properly call’d an Element, as a very quick Motion of the Particles in the inflammable [All the Planets have Fire.] Body. But be it what it will, there are many Arguments for their not being without it. For this Earth is not ſo truly call’d the Place of Fire as the Sun: and as by the Heat of that all Plants and Animals here thrive and live; ſo, no doubt, it is in the other Planets. Since then Fire is cauſed by a moſt intenſe and vigorous Heat, it follows that the Planets, eſpecially thoſe nearer the Fountain of it, have their proportionate degrees of Heat and Fire. And ſince there are ſo many ways of its Production, as by the collection of the Rays of the Sun, by the reflection of Mirrors, by the ſtriking of Flint and Steel, by the rubbing of Wood, by the cloſe loading of moiſt Graſs, by Lightning, by the eruptions of Mountains and Volcanos, it’s ſtrange if neither Art ſhould have produced it, nor Nature effected it there by one of theſe many means. Then how uſeful and neceſſary is it to us? By it we drive away Cold, and ſupply the want of the Sun in thoſe Countries where his oblique Rays make a leſs vigorous Impreſſion, and ſo keep a great part of the Earth from being an uninhabited Deſert: which is equally neceſſary in all the Planets, whether we allow them Succeſſion of Seaſons, or a perpetual Spring and Æquinox: for even then the Countries near the Pole would receive but little Advantage from the Heat of the Sun. By the help of this we turn the Night into Day, and thereby make a conſiderable addition to the ſhortneſs of our Lives. Upon all theſe Accounts we ought not to think this Earth of ours enjoy it all alone, and exclude all the other Planets from ſo advantageous and ſo profitable a Gift.