

Written in 523–524 AD while the Roman statesman Boethius was imprisoned and awaiting execution for treason, 'The Consolation of Philosophy' is a philosophical dialogue in 'prosimetrum' style—alternating between prose and verse. The work features a personified Lady Philosophy who visits the despairing Boethius in his cell to lead him back to the 'path of reason.' Through a series of five books, she helps him realize that his suffering is the result of a misunderstanding of the nature of Fortune and happiness. The book serves as a bridge between the Classical world's pagan philosophy (Platonism and Stoicism) and the Christian worldview that would dominate the Middle Ages (Wikipedia; SuperSummary).
Lady Philosophy explains that Fortune is by nature fickle and inconstant. To rely on her for happiness is a mistake, as the 'wheel' will inevitably turn, taking away wealth, power, and fame (LitCharts).
True happiness is internal and lies in the 'Summum Bonum' (the Highest Good), which Boethius identifies with God. External goods are merely 'sweetened poisons' that distract from the soul's true purpose (SuperSummary; enotes).
The book distinguishes between Providence—the eternal, unchanging plan of God—and Fate, which is the temporal manifestation of that plan as it unfolds in the physical world (Stanford Encyclopedia of Philosophy).
A major section addresses the paradox of how human free will can exist if an all-knowing God sees the future. Philosophy argues that God exists outside of time in an 'eternal present,' seeing all events simultaneously without imposing necessity upon them (Britannica).