This paper proposes a critical edition of Leibniz's "Annotatiunculae subitaneae ad librum de Christianismo Mysteriis carente" (1701), together with an Italian translation, and an introductory essay where I discuss the genesis of the text on the background of Leibniz's criticism of Locke's "way of ideas", and focus on Leibniz's taxonomy of the different meanings of "natural" and "supernatural".