Reputedly difficult, the thought of Plotinus (205-270) is the culmination of ancient philosophy. Inspired first and foremost by Platonism, but also by Aristotelianism and Stoicism, it requires the ability to move with ease through the labyrinth of Greek philosophy, which was completed by Neoplatonism. The present work offers a sort of Ariadne's thread for finding one's way through the Plotinian mazes, as outlined in the vigorous dialogues, organized in the form of Enneads after his death b...