Like many of the early Christian authors, Lactantius depended on
classical models.
Saint Jerome praised his writing style while faulting his ability as a Christian apologist, saying: "Lactantius has a flow of eloquence worthy of
Tully: would that he had been as ready to teach our doctrines as to pull down those of others!" Similarly, the early
humanists called him the "Christian
Cicero" (
Cicero Christianus).
Prophetic exegesis ca. 1420–1430 by Guglielmino Tanaglia Like many writers in the first few centuries of the early church, Lactantius took a
premillennialist view, holding that the second coming of Christ will precede a millennium or a thousand-year reign of Christ on earth. According to Charles E. Hill, "With Lactantius in the early fourth century we see a determined attempt to revive a more 'genuine' form of chiliasm." Lactantius quoted the
Sibyls extensively (although the
Sibylline Oracles are now considered to be
pseudepigrapha). Book VII of
The Divine Institutes indicates a familiarity with Jewish, Christian, Egyptian and Iranian apocalyptic material. Attempts to determine the time of the End were viewed as in contradiction to Acts 1:7: "It is not for you to know the times or seasons that the Father has established by his own authority," As an apologetic treatise, it was intended to point out the futility of pagan beliefs and to establish the reasonableness and truth of Christianity as a response to pagan critics. It was also the first attempt at a systematic exposition of Christian
theology in Latin and was planned on a scale sufficiently broad to silence all opponents.
Patrick Healy argues that "The strengths and the weakness of Lactantius are nowhere better shown than in his work. The beauty of the style, the choice and aptness of the terminology, cannot hide the author's lack of grasp on Christian principles and his almost utter ignorance of Scripture." However, his mockery of the idea of a
round Earth was criticised by
Copernicus as "childish". •
De mortibus persecutorum ("On the Deaths of the Persecutors") has an apologetic character but given Lactantius's presence at the court of Diocletian in Nicomedia and the court of Constantine in Gaul, it is considered a valuable primary source for the events it records. Lactantius describes the goal of the work as follows: "I relate all those things on the authority of well-informed persons, and I thought it proper to commit them to writing exactly as they happened, lest the memory of events so important should perish, and lest any future historian of the persecutors should corrupt the truth." The point of the work is to describe the deaths of the persecutors of Christians before Lactantius (
Nero,
Domitian,
Decius,
Valerian,
Aurelian) as well as those who were the contemporaries of Lactantius himself: Diocletian,
Maximian,
Galerius,
Maximinus and
Maxentius. This work is taken as a chronicle of the last and greatest of the persecutions in spite of the moral point that each anecdote has been arranged to tell. Here, Lactantius preserves the story of
Constantine's vision of the
Chi Rho before his
conversion to Christianity. The full text is found in only one manuscript, which bears the title
Lucii Caecilii liber ad Donatum Confessorem de Mortibus Persecutorum. • An
Epitome of the
Divine institutes is a summary treatment of the subject.
Other works •
De ira Dei ("On the Wrath of God" or "On the Anger of God"), directed against the
Stoics and
Epicureans. • Widely attributed to Lactantius although it shows only cryptic signs of Christianity, the poem
The Phoenix (
de Ave Phoenice) tells the story of the death and rebirth of
that mythical bird. That poem in turn appears to have been the principal source for the
famous Old English poem to which the modern title The Phoenix is given. ==Later heritage==