During this time, Christopher was left alone, except for his cat Jeoffrey and the occasional gawker. It is very possible that he felt "homeless" during this time and surely felt that he was in a "limbo… between public and private space". He had nothing else but to turn inwards and devote himself to God and his poetry. No specifics are known about Christopher Smart's day-to-day activities, and he was released from the asylum on January 30, 1763, but his poem was not to be published until 1939.
Jubilate Agno is divided into four fragments labeled "A", "B", "C", and "D". The whole work consists of over 1,200 lines: all the lines in some sections begin with the word Let; those in other sections begin with For. Those in the series beginning with the word "Let," associated names of human beings, mainly biblical, with various natural objects; and those beginning with the word "For" are a series of aphoristic verses.
Editing the work in 1950, W.H. Bond found that, "The poem was intended as a responsive reading; and that is why the Let and For sections [of the manuscript] are physically distinct while corresponding verse for verse. Smart's plan was to arrange the Let and For passages opposite one another antiphonally, following a practice of biblical Hebrew poetry, and that the present MS. represents less than half of Smart's original plan for the poem.
Although the original manuscript divided the "Let" and "For" verses onto opposing sides of the manuscript, Karina Williams claims that "Dr W. H. Bond then discovered that some of the LET and FOR folios were numbered and dated concurrently, and that these chronologically parallel texts were further connected by verbal links." Reinforcing this view of a parallel between the two sides is the fact that Christopher Smart's influence, Robert Lowth and his Lectures on the Sacred Poetry of the Hebrews, spends a large portion of his work exploring the "parallelism" found in "Hebrew verse. In Karina Williamson's 1980 edition, she made an editorial decision and combined the "Let" and the "For" and then justified this combining the two sides to follow each other based on Bond's claims.
Using Williamson's combining of the two halves as a model, Guest claims that the "For" verses explore religion with a "personal tone" and the "Let" are "unambiguous" and deal with public matters. Jeanne Walker goes further than Guest and reinforced Bond's claims that the "Let " and "For" sections are reminiscent of the Hebrew tradition when she states that the purpose of the poems, as with the Hebrew poems, is to "iterate both present and future simultaneously, that is, they redeem time.
In Jubilate Agno, Christopher describes his writing as creating "impressions". To accomplish this task, he incorporated puns and onomonpoeia in order to emphasize the theological significance of his poetic language. Jubilate Agno reflects an abandonment of traditional poetic structures in order to explore complex religious thought. His "Let" verses join creation together as he seemingly writes his own version of Biblical poetry. Christopher, in Jubilate Agno, plays on words and the meaning behind words in order to participate with the divine that exists within language. This is most exemplified when the poet says, "For I pray the Lord Jesus to translate my MAGNIFICAT into verse and represent it" (B43), where the image of the Magnificat connects Christopher Smart to Mary and her praise of God before giving birth to Jesus, the future savior.
For many of the pairs there is a logical or symbolic consistency. Figures, such as Abraham, Balaam, and Daniel are paired with animals mentioned directly in relationship with each other in their Biblical accounts, while others, like Isaac, are slightly more obscure are paired with animals that were involved in an important aspect of their life. Biblical priests follow the Patriarchs, and their animal companions are the :unclean: animals from Deuteronomy.
The pairing slowly breaks down when later figures, such as political leaders, enter into the poem. Along with this transformation of pairing comes insects, legendary creatures, and finally seven birds at the end of the fragment. The next section, "Fragment B" returns to the various animal pairs and, in a mixture of Old and New Testament figures, begins to rely on local animals or animals that pun off of aspects of the figure's life. One such example is a pun on Salmon and Salome as a pair for John the Baptist. This fish image is further expanded to play off the idea that the Apostles were originally "fishermen" along with being "fishers of men". This pairs continue to go on until the poem turns to creatures from Pliny at B245.
The pairing stops at B295 when the "For" verses become the only type remaining in the fragment. However, the pairing resumes in "Fragment C" when Biblical names from the Book of Ezra and the Book of Nehemiah are combined with various plants and herbs. The last section, "Fragment D", relies on personal friends and those known by Christopher Smart to be paired with various stones, gems, minerals and a few herbs.
The "new science" that rewrites Newton's laws of motion to include the divine (B159-B168):
The problems with Newtonian physics is, as Harriet Guest clains, "it is not based on the principles of revelation: it builds up general notions or theories from analyses of particular instances, rather than attempting to understand each instance through perceiving its relation to the whole revealed to faith. It is possible that Christopher Smart was influenced by John Hutchinson, Moses Principia being his major work on the subject, and it is Hutchinson that inspired Christopher to turn against Newtonian science as lacking a proper relationship with the divine. However, the poem's "new science" comes to an abrupt stop "as though," according to Curry, "[Christopher Smart] loses interest in it for a while.
The poem is chiefly remembered today - especially among cat lovers - for the 74-line section wherein Smart extols the many virtues and habits of his cat, Jeoffry. To this Neil Curry remarks, "They are lines that most people first meet outside the context of the poem as a whole, as they are probably the most anthologized extract in our literature. Furthermore, Jeoffrey himself is the "most famous cat in the whole history of English literature.
Christopher Smart is fond of his cat and praises his cat's relationship with God when he says (B695-B768):
His section of Jeoffrey is just part of his larger desire to give a "voice" to nature, and Christopher believes that nature, like his cat, is always praising God but needs a poet in order to bring out that voice. As such, the themes of animals and language are merged in Jubilate Agno, and Jeoffrey is transformed into a manifestation of the Ars Poetica tradition.
However, many critics have focused on the possible sexual images present in Jubilate Agno. The image of "horns" inJubilate Agnois commonly viewed as a sexual image. Easton puts particular emphasis on the image of horns as a phallic image and contends that there are masculine and feminine horns throughout Christopher's poem. Hawes picks up this theme and goes on to claims that the poem shows "that [Christopher Smart] had been ‘feminized’ as a cuckold. In response to this possible cuckolding, Jubilate Agno predicts a misogynistic future while simultaneously undermining this effort with his constant associations to female creation.