"Letters from Prison" by Rosa Luxemburg is a collection of letters written by the political activist during her imprisonment in a police prison in Berlin. In these letters, the author touches on deep philosophical and political issues of her time, expresses her views on society, the development of the labor movement, and the role of ideals in the struggle for justice. "Letters from Prison" is not only evidence of the struggle of one outstanding woman for ideals, but also a deep reflection of the thoughts and feelings of a person who survived repressions, but did not lose her humanism and faith in the victory of truth.