 In this treatise Lipsius attempts not only to reconstruct Stoic natural philosophy in detail, following the traditional didactic order of the doxographical tradition, but also to reassert its importance for Stoic ethics and theology. Here again the main burden of Lipsius’s work is to explain away conflicts between Stoic physics and Christianity or, failing that, to remove unresolved contradictions from his Christianized, Neostoic natural philosophy. To achieve this goal, he employs three different techniques for dealing with problematic Stoic doctrines: interpreting them allegorically, finding similarities with Christian beliefs and imposing Neoplatonic “corrections” on them.