The present article discusses the literary, linguistic, cultural, and spiritual qualities of unknown or forgotten monuments of ancient Polish literature. It also constitutes an attempt to prove the universalism of the art of the word. The analysis of messages of meditative and mystical literature of the 17th and 18th centuries provides a basis for this study. Most of the quoted records remain anonymous. However, it can be said with certainty that their authors were both women and men. It is worth noting that the quoted texts from meditative and mystical literature were composed in different spiritual traditions, including both the Carmelite and Benedictine spirituality. In particular, the author's research interests focused on how the writers of ancient mystical and meditative literature presented the art of love, both in terms of spiritual love (the relationship between God and man) and universal love that involves every dimension of the world we live in (the relationship between men themselves and between man and the world). A historical and literary analysis, which seems an indispensable tool for research on ancient Polish literature, has been applied to the study. The history of spirituality and old culture serves as a background for literary reflections. The literary and artistic quality of the quoted texts can be detected in numerous cultural references, literary references, a rich diversity of symbolism (the symbolism of the heart, symbolic images presenting intimacy between two people in love), diverse forms of expression (a dialogic structure of texts, an intimate inner monologue), an artistic depiction (the role of imagination). The conducted analysis has allowed the author to demonstrate the universality and timelessness of ideological and cultural messages of Polish mystical and meditative literature. Furthermore, it has been proven that the art of the word presented in the records is rooted neither in one national tradition nor in one language nor one culture. Although the texts date back to a remote period, they still present the universal beauty of the art of thought and the art of the word.