Grocott & Ward, comps. Grocott’s Familiar Quotations, 6th ed. 189-?.

Darkness Visible

Of darkness visible so much be lent,
As half to show, half veil the deep intent.
Pope.—The Dunciad, Book IV. Line 3.

Darkness visible.
Milton.—Paradise Lost, Book I. Line 63.

Darkness, thou first great parent of us all,
Thou art our great original!