The book includes six works of the largest Spanish philosopher of our century, first published in Russian - "The Theme of Our Time," "What is Philosophy?," "The Position of Science and Historical Reason," "The Emergence of Philosophy," "The Idea of ​ ​ Leibniz's Beginning and the Evolution of Deductive Theory," in which his understanding of the nature of philosophical knowledge and truth found a clear expression. Finally, as an appendix, the book included the essay "Poverty and the brilliance of translation." For philosophers and all readers interested in the history of world culture.