Date: 1741

"He whose Thoughts are very fluttering and wandering, and cannot be fixed attentively to a few Ideas successively, will never be able to survey many and various objects distinctly at once, but will certainly be overwhelm'd and confounded with the Multiplicity of them."

— Watts, Isaac (1674-1748)

Date: 1741

"An active Fancy readily wanders over a multitude of objects, and is continually entertaining itself with new flying Images; it runs thro' a Number of new Scenes or new Pages with pleasure, but without due Attention, and seldom suffers itself to dwell long enough upon any one of them to make a de...

— Watts, Isaac (1674-1748)

Date: 1741

"There are are some Persons who complain they cannot remember divine or human Discourses which they hear, when in Truth their Thoughts are wandering half the Time, or they hear with such coldness and Indifferency and a trifling Temper of Spirit, that it is no wonder the Things which are read or s...

— Watts, Isaac (1674-1748)

Date: 1742, 1777

"The heart, mean while, is empty of all enjoyment: And the mind, unsupported by its proper objects, sinks into the deepest sorrow and dejection."

— Hume, David (1711-1776)

Date: 1748, 1754

"But when [the mind] soars above mortal Cares and mortal Pursuits, into the Regions of Divinity, and converses with the greatest and best of Beings, it spreads itself into a wider Compass, takes higher Flights in Reason and Goodness, and becomes God-like in its Air and Manners."

— Fordyce, David (bap. 1711, d. 1751)

Date: 1748, 1749

"The human body is a machine that winds up its own springs: it is a living image of the perpetual motion."

— Julien Offray de La Mettrie (1709-1751)

Date: 1748, 1749

"Like that bird on yonder spray, the imagination seems to be perpetually ready to take wing."

— Julien Offray de La Mettrie (1709-1751)

Date: 1748, 1749

"As the string of a violin or harpsichord trembles and vibrates, so the fibres or strings of the brain struck by the undulating rays of sound, are excited to return or repeat the words that touched them."

— Julien Offray de La Mettrie (1709-1751)

Date: Saturday March 24, 1750

"The natural flights of the human mind are not from pleasure to pleasure, but from hope to hope."

— Johnson, Samuel (1709-1784)

Date: 1751

"Mankind would be in a perpetual reverie; ideas would be constantly floating in the mind; and no man be able to connect his ideas with himself."

— Home, Henry, Lord Kames (1696-1782)