Others again said, this opinion could not stand with reason; for fire being a destroyer of all things, the sun-stone after this manner would burn up all the near adjoining bodies: Besides, said they, fire cannot subsist without fuel; and the sun-stone having nothing to feed on, would in a short time consume itself; wherefore they thought it more probable that the sun was not actually hot, but only by the reflection of its light; so that its heat was an effect of its light, both being immaterial. But this opinion again was laughed at by others, and rejected as ridiculous, who thought it impossible that one immaterial should produce another; and believed that both the light and heat of the sun proceeded from a swift circular motion of the aethereal globules, which by their striking upon the optic nerve, caused light, and their motion produced heat: But neither would this opinion hold; for, said some, then it would follow, that the sight of animals is the cause of light; and that, were there no eyes, there would be no light; which was against all sense and reason.