On Nature

Lucius Annaeus Seneca (4 BC - 65 AD) - a Roman Stoic philosopher, who studied rhetoric in Rome, the author of speeches and tragedies, philosophical treatises and letters, including "Moral Letters to Lucilius". In the treatise "On Nature", Seneca somewhat repeats the old teaching about the elements. These are water and fire, air and earth. All these elements are interconvertible, and therefore, everything is in everything and everything arises from everything, for nature and the world are a unity. It is nature and the Cosmos that, for the Stoics, are the sources of being, order, purpose, providence, good, and virtue, and according to Stoic views, they are divine.