To prejudge other men's notions before we have looked into them is not to show their darkness but to put out our own eye

While the cock with lively din, Scatters the rear of darkness thin; And to the stack, or the barn door, Stoutly struts his dames before; Oft list'ning how the hounds and horn, Cheerly rouse the slumb'ring morn

Dark as pitch.

Yet from those flames No light, but rather darkness visible.

A dungeon horrible, on all sides round,
As one great furnace flamed; yet from those flames
No light; but rather darkness visible
Served only to discover sights of woe

Things of this world are in so constant a flux, that nothing remains long in the same state.