Astra inclinant is the first half of the fuller maxim astra inclinant, sed non necessitant (
the stars incline, but do not compel). This distinction between inclination and compulsion is philosophically crucial: it preserves human free will
within a universe that is nonetheless cosmically ordered and influential. Students should note that this is precisely the position of Dante in the Divine Comedy, where the influence of the heavens on human character is real but does not override free will. The phrase is central to discussions of
astrology in
Renaissance poetry —
Sidney,
Spenser, and
Shakespeare all engage it — and to broader questions of determinism and freedom in verse. Related concepts include fatum (fate), fortuna (
fortune), and the debate between
Stoic determinism and
the Epicurean swerve (clinamen) that preserves random freedom within a material universe.