Date: 1776

"Causation considered as an associating principle, is, in his theory, no more than the contiguous succession of two ideas, which is more deeply imprinted on the mind by its experience of a similar contiguity and succession of the impressions from which they are copied."

— Campbell, George (1719-1796)

Date: 1776

"My third observation is, that pain of every kind generally makes a deeper impression on the imagination than pleasure does, and is longer retained by the memory."

— Campbell, George (1719-1796)

Date: 1776

"Sense in this passage denotes an inward feeling, or the impression which some sentiment makes upon the mind."

— Campbell, George (1719-1796)

Date: 1776

"It is not more evident that the imagination is more strongly affected by things sensible than by things intelligible, than it is evident that things animate awaken greater attention, and make a stronger impression on the mind than things senseless."

— Campbell, George (1719-1796)

Date: 1776

"You will thus convert a piece of abstruse reflexion, which, however just, makes but a slender impression upon the mind, into the most affecting and instructive imagery."

— Campbell, George (1719-1796)

Date: September, 1781

"To think in this manner is to augment our existence, as instead of reckoning a third of our life mere waste, we habituate ourselves to attend to the result of our hours past in Sleep, and to recover out of the mass of thought produced during that period, very often amusement, and sometimes usefu...

— Boswell, James (1740-1795)

Date: 1783

"Aristotle seems to think, that every object of sense makes, upon the human soul, or upon some part of our frame, a certain impression; which remains for some time after the object that made it is gone; and which, being afterwards recognized by the mind in sleep"

— Beattie, James (1735-1803)

Date: April, 1783

"If impressions are made upon some substance in the mind, may not forgetfulness of them be only that the perceptive faculty of the soul is turned to other objects, while these still remain ready to be perceived whenever the 'mind's eye,' glances upon them?"

— Boswell, James (1740-1795)

Date: April, 1783

"Has he been at work all night without being conscious of it. Have other spirits been making impressions on his sensorium. Are there faculties in the mind quite separate one from another, which, like the eyes of Argus, may some of them be awake while others are asleep, and is the great faculty of...

— Boswell, James (1740-1795)

Date: 1783

"From reading the most admired productions of genius, whether in poetry or prose, almost every one rises with some good impressions left on his mind; and though these may not always be durable, they are at least to be ranked among the means of disposing the heart to virtue."

— Blair, Hugh (1718-1800)