Deprecatoria ad Deum / Twelve Rules of a Christian Life
Da mihi, Domine, quod ignoro, quod scio ut custodiam, quod nescio ut discam.
Our renderingGive me, Lord, to know what I do not know, to keep what I do know, and to learn what I have not yet learned.
What it is
Pico della Mirandola — who settled in Florence in November 1484 under the protection of Lorenzo de' Medici — composed a Latin elegiac prayer to God (Deprecatoria ad Deum) and a set of Twelve Rules of a Christian Life, both included in his Opera omnia and translated into English by Thomas More (printed by Wynkyn de Worde c. 1510), who praised the work as an expression of genuine simple Christian godliness. The Heptaplus (1489) bears a documented dedication to Lorenzo; the Deprecatoria circulated within the same Medici-hosted intellectual circle, though it does not carry a formal Medici dedication. These devotional works reveal the inner piety coexisting with Pico's speculative philosophy and gained wider circulation through More's English translation.
Why it still matters
The Twelve Rules and the Deprecatoria are completely accessible as concise practical and poetic spiritual guides; Thomas More's translations are freely available online and the texts work well as a brief daily examination of conscience or morning prayer.
Kept alongside
The Imitation of Christ (De imitatione Christi)
De imitatione Christi
The most widely read Christian devotional work after the Bible, composed c. 1418–1427 by Thomas à Kempis at the Augustinian monastery of Mount Saint Agnes near Zwolle. Hundreds of printed editions appeared across Europe before 1600; French translations were in print from 1488 (Toulouse) and 1493 (Paris), and the text was standard reading in every Jesuit novitiate, including those that trained the French royal confessors Coton and Caussin. Its four books counsel contempt of worldly vanity, interior self-knowledge, spiritual consolation, and sacramental devotion — an architecture that moves the reader systematically from self-examination to union with Christ. While no single documented ownership record for either Medici queen has been identified, its universal penetration of Catholic court culture across two centuries makes its presence in any royal household effectively certain.
Prison Meditations on Psalms 51 and 31
Savonarola composed these meditations on Psalm 51 (Miserere, known as 'Infelix ego') and Psalm 31 (In te, Domine, speravi) in Latin while imprisoned in the Palazzo della Signoria in 1498 awaiting trial and execution, his right hand temporarily spared from further torture so he could sign his confession. Approximately 15 Italian editions appeared by 1500, making them among the most rapidly disseminated devotional texts of the early print era and ensuring pan-European reach within a decade. Savonarola had preached at San Marco — the monastery Cosimo de' Medici built and patronized — from 1482 and was the friar summoned to Lorenzo de' Medici's deathbed in 1492, giving these works an indirect but real connection to the Medici devotional world. The Miserere meditation (Infelix ego) became one of the most reprinted Latin spiritual texts of the sixteenth century.
Infelix ego (Meditation on Psalm 51 / Miserere)
Infelix ego, omnium auxilio destitutus
A profound Latin meditation on Psalm 51 (Miserere) composed in his Florentine prison cell by the Dominican friar Savonarola shortly before his execution on 23 May 1498. Despite being the Medici's principal political opponent, his text circulated in fifteen Italian editions by 1500 in the very city where Giovanni de' Medici (future Leo X) and Giulio de' Medici (future Clement VII) were formed; Martin Luther endorsed it in 1523. Josquin des Prez, Cipriano de Rore, and William Byrd set versions to polyphony, securing its place across a century of European devotional music. Its connection to Medici piety is environmental rather than by commission or documented use.