Epistulae Morales ad Lucilium (Latin for "Moral Letters to Lucilius"), also known as the Moral Epistles and Letters from a Stoic, is a letter collection of 124 letters that Seneca the Younger wrote at the end of his life, during his retirement, after he had worked for the Emperor Nero for more than ten years. They are addressed to Lucilius Junior, the then procurator of Sicily, who is known only through Seneca's writings.