Memory
Hume writes, “Every one will readily allow, that there is a considerable difference between the perceptions of the mind, when a man feels the pain of excessive heat, or the pleasure of moderate warmth, and when he afterwards recalls to his memory this sensation, or anticipates it by his imagination.” Memory stores the perceptions of various experiences. Accordingly, it enables individuals to recall senses of past experiences. Imaginations about likely feelings are based on an individual’s past experiences with various actions.
Impression
Hume explains, “By the term impression, then, I mean all our more lively perceptions, when we hear, or see, or feel, or love, or hate, or desire, or will. And impressions are distinguished from ideas, which are the less lively perceptions, of which we are conscious, when we reflect on any of those sensations or movements above mentioned.” Impressions occur in the conscious mind; hence, when they transpire an individual can recognize them. Through impressions, humans experience sensitivities which relate to real-life experiences.
Monsters
Hume observes, “To form monsters, and join incongruous shapes and appearances, costs the imagination no more trouble than to conceive the most natural and familiar objects. And while the body is confined to one planet, along which it creeps with pain and difficulty; the thought can in an instant transport us into the most distant regions of the universe; or even beyond the universe, into the unbounded chaos, where nature is supposed to lie in total confusion.” Conceptions of monsters in the mind underscores the inherent fears which govern the mind’s ideas. Monsters are scary; hence, they could elicit unconscious chaos that contribute to the thinker’s horrors. The mind can conceive imaginary images which are not common in the universe such as monsters.
Uniformity
Hume elucidates, “We must not, however, expect that this uniformity of human actions should be carried to such a length as that all men, in the same circumstances, will always act precisely in the same manner, without making any allowance for the diversity of characters, prejudices, and opinions." It is impracticable for human beings to act uniformly. People are governed by various ideologies which would not result in uniform outcomes.Moreover, contexts, which are highly diverse, influence the actions which individuals are involved in.
Consistency
Hume recommends, “The philosopher, if he be consistent, must apply the same reasoning to the actions and volitions of intelligent agents. The most irregular and unexpected resolutions of men may frequently be accounted for by those who know every particular circumstance of their character and situation.” Consistent thinking would increase the reliability of a philosopher. Besides, consistency makes a philosopher's conduct to be predictable. Inevitable irregularities in a philosopher's rationales should be minimized and reconciled.