 Lipsius did, in fact, go on to supply such an account, at least in relation to Stoic thought. Fearing that his poor health would prevent him from completing his edition and commentary on Seneca, Lipsius, at the end of 1602, decided to publish beforehand his Manuductio ad Stoicam philosophiam (“Guide to Stoic Philosophy”) and Physiologia Stoicorum (“Physical Theory of the Stoics”). A third work in this series, to be entitled Ethica, was planned but never completed. In the two published treatises, which came out in 1604, Lipsius attempted to reconstruct a coherent philosophical system of Stoicism, focusing, as he had done in De constantia, on its compatibility with Christian doctrine.