Sublime: first studied by Edmund Burke and Immanuel Kant in the seventeen hundreds which Kant wrote essay on the Sublime and Beautiful. For Kant, the sublime represented a feeling derived from aesthetic judgment, in which we realize the limits of our human nature: that is, we realize we cannot conceive of something because it is part of the nominal realm. Much like being next to a brick wall, we know the wall is there and that, presumably, there is something inaccessible on the other side. For Kant, the thrill we get from this realization is true sublimity; the realization that we cannot fully comprehend our own nature.

Kant also described the sublime, in relation to how the mind operates under its effects, as rapidly alternating between two states—attraction and repulsion. The mind oscillates between the two states, which can account for the paradox of thinking that two feelings are happening at the same time. For example, infinity is a cause for the sublime. We cannot comprehend "forever," whether spatially or in relation to time. But it is this mystery that fascinates us, draws us in, even though it repulses the logical mind. So at one moment we feel incompetent at the inability to comprehend this idea, but in the next we may be fascinated and awed.

Sublime was also used in romantics’ writings during the eighteen hundreds.

The pastoral genre was invented in the Hellenistic era by the Sicilian poet Theocritus, who may have drawn on authentic folk traditions of Sicilian shepherds. The Roman poet Virgil adopted the invention and wrote eclogues, which are poems on rustic and bucolic subjects that set an example for the pastoral mood in literature.

Nostalgia currently describes a longing for the past, often idealized and unrealistic.

The term was originally coined in 1678 by Jean-Jacques to refer to "the pain a sick person feels because he is not in his native land, or fears never to see it again". This neologism was so successful that people forgot its origin. Moreover, its original meaning referring to a serious medical disorder which has been lost as the word nostalgia entered everyday language.