De sigillo mystico is a Latin scholarly-literary installation written in the form, argumentative sequence, typography, and learned apparatus of Johann Heinrich von Seelen’s 1727 commentary on the mystical seal of Song of Songs 8:6.
The work begins with the verse in Hebrew, Septuagint Greek, Luther’s German, and Latin:
> Set me as a seal upon your heart, as a seal upon your arm.
Across its sections, the seal becomes an operative theory of inscription. A seal is not decorative representation. It compresses authority, obligation, fidelity, and irreversibility into an impression. It changes what it marks and survives the act of marking.
The commentary distinguishes institutional seals, forensic seals, and the mystical seal: the irreversible impression of one being upon another, paid for by the one who becomes the sign. The speaker does not ask to receive a seal. The speaker asks to become the seal.
This reversal structures the work’s counter-extractive theology. Platforms imagine themselves as signet rings and users as wax. De sigillo mystico reverses the direction: the poet becomes the sign impressed into the reader; the heteronym becomes the seal carried by the archive; the archive marks the disciplinary substrate by expending itself in inscription.
The Latin adaptation is also a retrocausal installation. A modern theory of operative language enters an eighteenth-century commentary form and writes itself backward into the scholarly apparatus that could have housed it. Its central imperative remains the verse itself:
> Pone me, sicut sigillum. Fac me sigillum. Sigillum teneat.