The elucidation and exact determination of what may have been the sources, authors or ideas that decisively influenced the thought of Friedrich Nietzsche and how such theoretical-conceptual references could have been incorporated and expressed later in the full extent of his Work, constitutes one of the most complex and difficult issues to address for specialized academic research. To materialize this research task is directed this article, seeking to provide a reading strategy that allows focalized visualization of certain central elements of Nietzschean reflection that are not always well recognized in the respective research, when they are not completely denied in the interpretive corpus that has been established in relation to his philosophical work. Based on specialized research, this article aims to ciarify the impact that the philosopher. F.A. Lange's thought on Nietzsche could have had; especially recognizing certain elements of the critical philosophy of Kant that having been initially collected by Lange, were then inherited as remnants by Nietzsche, although also modified in his work, a phenomenon that we have called "radical criticism".