Saint Bernard of Clairvaux

De Consideratione ad Eugenium (On Consideration, to Eugene) is Bernard of Clairvaux's last major treatise, composed between 1149 and 1152 and addressed to Pope Eugene III, a former monk of Clairvaux whom Bernard had personally formed before his elevation to the papacy. Written in five books, the work is at once a spiritual manual and a mirror for princes: Bernard urges the newly burdened pope not to let the ceaseless business of Rome — litigation, petitions, the "malicious occupations" of the Curia — extinguish the interior life of consideratio, the reflective self-examination that alone keeps action rightly ordered. The treatise moves outward in careful stages, following the fourfold scheme Bernard sets as its architecture: the pope's consideration of himself, of what lies beneath him (the clergy and people of Rome), of what surrounds him (the cardinals and household), and finally of what lies above him, culminating in Book V's ascent toward the contemplation of God, angelic hierarchy, and the divine nature itself. Alongside its mystical and pastoral concerns, the work is notable for its unsparing critique of curial corruption, its meditation on the proper limits of papal power (including the celebrated distinction between the "two swords"), and its warning — startling in an address to a reigning pope — that Eugene's worldly pomp descends "not from Peter, but from Constantine." Blending rhetorical intensity, biblical exegesis, and Cistercian spirituality, De Consideratione stands as one of the most influential texts of twelfth-century ecclesiology and remains a foundational witness to the monastic critique of ecclesiastical power.