broadening of source material. Plato, known directly only through two and a half dialogues in the Middle Ages, came to be known through numerous Latin translations in fifteenth century Italy, culminating in the hugely influential translation of his complete works by Marsilio Ficino in Florence in 1484. Petrarch was not able to read Plato directly, but he greatly admired him. Petrarch was also a great admirer of Roman poets such as Virgil and Horace and of Cicero for Latin prose writing. Not all Renaissance humanists followed his example in all things, but Petrarch contributed to a broadening of his time's 'canon' (pagan poetry had previously been considered frivolous and dangerous), something that happened in philosophy as well. In the sixteenth century anyone who considered himself 'au fait' read Plato as well as Aristotle, trying as much as possible (and not always very successfully) to reconcile the two with each other and with Christianity. This is probably the main reason why Donato Acciaiuoli's commentary on Aristotle's Ethics (first published in 1478) was so successful: it blended the three traditions beautifully. Other movements from ancient philosophy also re-entered the mainstream. While this was seldom the case for Epicureanism, which was largely caricatured and considered with suspicion, Pyrrhonism and Academic Skepticism made a comeback thanks to philosophers such as Michel de Montaigne, and Neostoicism became a popular movement due to the writings of Justus Lipsius. Other important figures, such as Francesco Petrarca (Petrarch) (1304–1374), questioned the whole assumption that the theoretical aspects of philosophy were the more important ones. He insisted, for instance, on the value of the practical aspects of ethics. Petrarch's position, expressed both strongly and amusingly in his invective On His Own Ignorance and That of Many Others (De sui ipsius ac multorum ignorantia) is also important for another reason: it represents the conviction that philosophy should let itself be guided by rhetoric, that the purpose of philosophy is therefore not so much to reveal the truth, but to encourage people to pursue the good. This perspective, so typical of Italian humanism, could easily lead to reducing all philosophy to ethics, in a move reminiscent of Plato's Socrates and of Cicero. Method of philosophy If, as mentioned above, scholasticism continued to flourish, the Italian humanists (i.e., lovers and practitioners of the humanities) challenged its supremacy. As we have seen, they believed that philosophy could be brought under the wing of