Hardy had a life-long fascination with the paradox of memory: how people, events, and even isolated feelings can be buried by time and later resurrected in the fullness of emotional memory. His central aesthetic principle is that of `the exhumed emotion,' which one can wryly interpret as a graveyard variant of Wordsworth's "emotion recollected in tranquillity." But for Hardy, it was a mysterious capability, like his comment that "I am cut out by nature for a ghost-seer." Hardy's aesthetic of the "grotesque" frequently features past lovers as ghosts or elusive phantoms.
In "She, to Him III" he muses on the "souls of Now" who would disjoint / The mind from memory, making Life all aim, / And nothing left for Love to look upon." In this brief phrase, from the start of his career, can be found four of the major themes of his entire life and work: the present ("Now"), memory (past), Life, and Love, all in tension with one another.
The volume contains innumerable poems of unrequited love, regretted love, guilty love, repentant love, etc. etc. One of the great English poets of the 20th century. Ranks with Yeats and above Heaney.