Il Penseroso ("the thinker") is a poem by John Milton, first found in the 1645/1646 quarto of verses The Poems of Mr. John Milton, both English and Latin, published by Humphrey Moseley. It was presented as a companion piece to L'Allegro, a vision of poetic mirth. The speaker of this reflective ode dispels "vain deluding Joys" from his mind in a ten-line prelude, before invoking "divinest Melancholy" to inspire his future verses. The melancholic mood is idealised by the speaker as a means by which to "attain / To something like prophetic strain," and for the central action of Il Penseroso – which, like L'Allegro, proceeds in couplets of iambic tetrameter – the speaker speculates about the poetic inspiration that would transpire if the imagined goddess of Melancholy he invokes were his Muse.