The Odes () are a collection in four books of Latin lyric poems by Horace. The Horatian ode format and style has been emulated since by other poets. Books 1 to 3 were published in 23 BC. A fourth book, consisting of 15 poems, was published in 13 BC. The Odes were developed as a conscious imitation of the short lyric poetry of Greek originals – Pindar, Sappho and Alcaeus are some of Horace's models. His genius lay in applying these older forms to the social life of Rome in the age of Augustus. The Odes cover a range of subjects – love, friendship, wine, religion, morality, patriotism; poems of eulogy addressed to Augustus and his relations; and verses written on a miscellany of subjects and incidents, including the uncertainty of life, the cultivation of tranquility and contentment, and the observance of moderation or the "golden mean." The Odes have been considered traditionally by English-speaking scholars as purely literary works. Recent evidence by a Horatian scholar suggests they may have been intended as performance art, a Latin re-interpretation of Greek lyric song. The Roman writer Petronius, writing less than a century after Horace's death, remarked on the curiosa felicitas (studied spontaneity) of the Odes (Satyricon 118). The English poet Alfred Tennyson declared that the Odes provided "jewels five-words long, that on the stretched forefinger of all Time / Sparkle for ever" (The Princess, part II, l.355). Book 1 Book 1 consists of 38 poems. The phrase Nunc est bibendum, "Now is the time to drink!", is the opening of I.37. I.1, Maecenas atavis edite regibus... – Dedication of the First Three Books of the Odes to Maecenas (Horace's Patron) – Every man is governed by his ruling passion: the Olympian charioteer, the politician, the trader, the husbandman, the merchant, the man of pleasure, the soldier, and the hunter. To win the title of a lyric poet is all that Horace desires. I.2, Iam satis terris nivis atque dirae... – To Augustus, The Deliverer and Hope of the State – The subject of this ode is the overflowing of the Tiber, which recalls to the poet the flood of Deucalion. He imagines that the disaster is caused by the wrath of Ilia (the wife of Tiber), the civil wars, and the assassination of Julius Caesar. Augustus, as Mercury in human shape, is invoked to save the empire. I.3, Sic te diva