Date: c. 1804-1811, 1818

"For every human heart has gates of brass & bars of adamant, / Which few dare unbar because dread Og & Anak guard the gates"

— Blake, William (1757-1827)

Date: c. 1804-1811, 1818

"Terrific! and each mortal brain is walld and moated round / Within"

— Blake, William (1757-1827)

Date: c. 1804-1811, 1818

Og & Anak watch in the brain which "is the Seat / Of Satan in its Webs; for in brain and heart and loins / Gates open behind Satans Seat to the City of Golgonooza / Which is the spiritual fourfold London, in the loins of Albion"

— Blake, William (1757-1827)

Date: 1804

"The Spectre is the Reasoning Power in Man; & when separated / From Imagination, and closing itself as in steel, in a Ratio / Of the Things of Memory"

— Blake, William (1757-1827)

Date: 1804

"Los took his globe of fire to search the interiors of Albions / Bosom, in all the terrors of friendship, entering the caves / Of despair & death, to search the tempters out"

— Blake, William (1757-1827)

Date: c. 1804-1811, 1818

"Urizen lay in darkness & solitude, in chains of the mind lock'd up."

— Blake, William (1757-1827)

Date: 1806

"On a shelf, / (Yclept a mantle-piece) a phial stands, / Half fill'd with potent spirits!--haunt the poet's restless brain, / And fill his mind with fancies whimsical."

— Robinson [Née Darby], Mary [Perdita] (1758-1800)

Date: 1806

The fancy may be sick (and borne on a grey goose wing to immortal fame)

— Robinson [Née Darby], Mary [Perdita] (1758-1800)

Date: 1791, 1806

"As Reason, fairest daughter of the skies, / Explor'd the vale, where mortal mis'ry lies; / Led on by fortitude, with eye serene, / She mark'd each object of the varying scene."

— Robinson [Née Darby], Mary [Perdita] (1758-1800)

Date: 1797, 1806

"While shadows, blanks to reason's orb, / In dread succession haunt the brain"

— Robinson [Née Darby], Mary [Perdita] (1758-1800)