Date: c. 1680

"The Vitall Spirits apprehend thereby / Exposde to danger great suburbs ly, / The which they do desert, and speedily / The Fort of Life the Heart, they Fortify, / The Heart beats up still by her Pulse to Call / Out of the outworks her train Souldiers all / Which quickly come hence."

— Taylor, Edward (1642-1729)

Date: 1691

"First, for Use; So we see the Senses of such eminent Use for our well-being, situate in the Head, as Sentinels in a Watch-Tower, to receive and conveigh to the Soul the impressions of external Objects"

— Ray [formerly Wray], John (1627–1705)

Date: 1696

"I find the danger now: my Spirits start / At the alarm, and from all quarters come / To Man my Heart, the Citadel of love."

— Southerne, Thomas (1659-1746)

Date: 1712

"The watchful Centinels at ev'ry Gate, / At ev'ry Passage to the Senses wait."

— Blackmore, Sir Richard (1654-1729)

Date: 1787

"Again, when some desires retire, there are others akin to them, which grow up, and through inattention to the father's instructions, become both many and powerful, draw towards intimacies among themselves, and generate a multitude, seize the citadel or the soul of the youth, finding it evacuated...

— Adams, John (1735-1826)