Date: 1792

One can "wage war" on his own heart and "conquer it, or perish"

— Brooke, Henry (c. 1703-1783)

Date: 1792

"O, the fell conflict, the intestine strife, / This clash of good and evil, death and life! / What, what are all the wars of sea and wind, / Or wreck of matter, to This War of Mind?"

— Brooke, Henry (c. 1703-1783)

Date: 1792

"Two minds in one, and each a truceless guest, / Rending the sphere of our distracted breast!"

— Brooke, Henry (c. 1703-1783)

Date: w. c. 1800-1807, 1866

"Joy & Woe are woven fine / A Clothing for the soul divine / Under every grief & pine / Runs a joy with silken twine"

— Blake, William (1757-1827)

Date: w. c. 1800-1807, 1866

"The Questioner who sits so sly / Shall never know how to Reply / He who replies to words of Doubt / Doth put the Light of Knowledge out"

— Blake, William (1757-1827)

Date: w. c. 1800-1807, 1866

"We are led to Believe a Lie / When we see not Thro the Eye / Which was Born in a Night to perish in a Night / When the Soul Slept in Beams of Light / God Appears & God is Light / To those poor Souls who dwell in Night / But does a Human Form Display / To those who Dwell in Realms of day"

— Blake, William (1757-1827)

Date: 1808

"'But when the Bard by Arun's stream / Indulg'd each sadly tender theme, / And with enchantment wild combin'd / The countless "shadowy tribes of mind;'"

— Grant [née MacVicar], Anne (1755-1838)