Tertullian

“ But what, says Soranus (in answer to this argument) , if men should deny that the sea is a bodily substance, because a ship out of the water becomes a heavy and motionless mass? How much truer and stronger, then, is the soul’s corporeal essence, which carries about the body, which eventually assumes so great a weight with the nimblest motion! Again, even if the soul is invisible, it is only in strict accordance with the condition of its own corporeality, and suitably to the property of its own essence, as well as to the nature of even those beings to which its destiny made it to be invisible. ”

“ The eyes of the owl cannot endure the sun, whilst the eagle is so well able to face his glory, that the noble character of its young is determined by the unblinking strength of their gaze; while the eaglet, which turns away its eye from the sun’s ray, is expelled from the nest as a degenerate creature! So true is it, therefore, than to one eye an object is invisible, which may be quite plainly seen by another,—without implying any incorporeality in that which is not endued with an equally strong power (of vision) . The sun is indeed a bodily substance, because it is (composed of) fire ”

“ And where individual creatures possess various properties, does not this variety in works of the same class indicate the greatness of the Creator, in making them at the same time different and yet like, amicable yet rivals? ”