Truly, what kind of colour could there be In the viewless dark? Nay, in the light itself A colour changes, gleaming variedly, When smote by vertical or slanting ray. Thus in the sunlight shows the down of doves That circles, garlanding, the nape and throat: Now it is ruddy with a bright gold-bronze, Now, by a strange sensation it becomes Green-emerald blended with the coral-red. The peacock's tail, filled with the copious light, Changes its colours likewise, when it turns. Wherefore, since by some blow of light begot, Without such blow these colours can't become.
