What passes for knowledge is of two kinds : first knowledge of facts; second, knowledge of the general connection between facts very closely connected with this distinction is another: there is knowledge which may be described as "mirroring", and knowledge which consists in capacity to handle Leibinitz's monads 'mirror' the universe, and in this sense know it; but since monads never interact they cannot handle any thing external to themselves. This is the logical extreme of one conception of "knowledge". The logical extreme of the other conception is pragmatism which was first promulgated by Marx in his Thesis on Feuerbach (1845) the question whether objective truth belongs to human thinking is not a question of theory, but a practical question, the truth, i.e. the reality and power of thought must be demonstrated in practice ___________ philosophers have only interpreted the world in various ways, but the real task is to alter it.