Alongside Meister Eckhart, Nikolaus of Cusa (1401-1464), also known as Cusanus, is perhaps the most renowned German philosopher at the end of the Middle Ages. In his epistemological reflections, influenced by late medieval and humanistic Neoplatonic thought, the cardinal allows space for faith - humans can only grasp the essence of things approximately; the goal is "docta ignorantia," or "knowing ignorance." Without smoothing over Cusanus' contradictions, this overview provides crucial insights into the body of texts and the wealth of interpretations.