Steiner approached the philosophical questions of knowledge and freedom in two stages. In his dissertation, published in expanded form in 1892 as "Truth and Knowledge", Steiner suggests that there is an inconsistency between Kant's philosophy, which posits that all knowledge is a representation of an essential verity inaccessible to human consciousness, and modern science, which assumes that all influences can be found in the sensory and mental world to which we have access. Steiner considered Kant's philosophy of an inaccessible beyond ("Jenseits-Philosophy") a stumbling block in achieving a satisfying philosophical viewpoint.