Work dossier · summary and historical context
De Substantia Dilectionis is a short Latin treatise on the nature of love, traditionally attributed to Augustine but now considered spurious. The work develops a central metaphor of two streams flowing from a single spring of love, distinguishing between caritas (divine love) and cupiditas (worldly desire). It survives in a single manuscript tradition and was first printed among the spuria in the Maurist edition of Augustine's Opera Omnia (1679–1700). The author likely wrote in a monastic or catechetical context, possibly in the 5th–6th century, and the text shows echoes of Platonic and Stoic psychology adapted to a Christian framework. The treatise was not cited by medieval scholastics, and its title appears only in later medieval catalogues.
De Substantia Dilectionis illustrates the early medieval reception and adaptation of Augustinian thought on love, particularly the distinction between caritas and cupiditas. Its survival as a spurious work in the Augustinian corpus highlights the fluidity of authorship in late antique and early medieval Christian literature. The treatise also provides insight into monastic or catechetical teaching on love in the post-Augustinian period.
The work is undated, but stylistic comparison with authentic Augustinian treatises suggests a post-Augustinian origin, likely 5th–6th century. It survives in a single manuscript tradition, with the title De Substantia Dilectionis appearing only in later medieval catalogues. The treatise was not cited by medieval scholastics; its first printed edition appeared in the Maurist Opera Omnia (1679–1700) among the spuria. The author's claim of daily discourse on love reflects a monastic or catechetical context, where love was a frequent topic. The Latin 'amor' is used generically for love, while 'dilectio' (in the title) and 'caritas' are distinguished as divine love; 'cupiditas' denotes worldly desire. The metaphor of two streams from a single spring of love echoes Platonic and Stoic psychology, adapted by Augustine to contrast caritas and cupiditas as roots of good and evil. The phrase 'sermo Dei de amore loquitur' likely alludes to 1 John 4, where love is central.
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