This text examines Karl Marx's distinction between the concepts of "subject-matter" and "object" as presented in his XI. Theses on Feuerbach. The author highlights Marx's critique of metaphysical thought, which tends to reduce the "subject-matter" to a mere "object." A central point of the analysis is the lack of explicit clarity in Marx's original formulation, particularly regarding the demand that the object be understood "subjectively." In this philosophical context, subjectivity does not imply arbitrariness or personal whim; rather, it emphasizes the significant and constitutive relationship between the subject and the object of inquiry. The discussion further draws parallels with Ludwig Feuerbach's "The Essence of Christianity," specifically using his analogy of planets and their relationship to the sun to illustrate how reality is fundamentally linked to the subject's perspective. The abstract summarizes the challenges in defining these terms and suggests that Marx's approach necessitates a profound understanding of human-world interaction, moving beyond the simplistic objectification characteristic of traditional metaphysics.