Seuse (ca. 1295-1366) describes in his Horologium Sapientiae (clock of wisdom) how he searched for the right way of life in faith. It was one of the most-read medieval devotional books, and many richly decorated manuscripts of it are extant.
The following sentences from the foreword seem to explain the title:
divina sapientia ... intendit ... reaccendere exstinctos, frigidos inflammare, movere tepidos, indevotos ad devotionem provocare ac somno neglegentiae torpentes ad virtutum vigilantiam excitare. Unde et praesens opusculum in visione quadam sub cuiusdam horologii pulcherrimi rosis speciosissimis decorati et cymbalorum bene sonantium et suavem ac caelestem sonum reddentium cunctorumque corda sursum moventium varietate perornati figura dignata est ostendere clementia salvatoris.
In a mid 15th century manuscript of a French translation of the book, this paragraph is illustrated by a detailed illumination (google books). Sapientia (the “Wisdom” from the “Book of Wisdom,” an apocryphal chapter of the Old Testament) appears as a guide for the author of the book. Besides the clock and the carillon, interestingly, a great number of astronomical instruments are also shown in the picture. There are a number of other medieval manuscripts of the same book with different illuminations. [See for example Frank Deleu: "Het ontstaan van de beiaard", in: Gilbert Huybens, ed.: Beiaarden en Torens in België, Gent: Ludion, 1994, 15-24: 20-21.]