Dietzgen examines what we do when we think. He discovered that thinking is a process involving two opposing processes: generalization, and specialization. All thought is therefore a dialectical process. Our knowledge is inherently limited however, which makes truth relative and the seeking of truth on-going. The only absolute is existence itself, or the universe, everything else is limited or relative. Although a philosophical materialist, he extended these concepts to include all that was real, existing or had an impact upon the world. Thought and matter were no longer radically separated as in older forms of materialism. is vital for theorists today in that it lays the basis for a non-dogmatic, flexible, non-sectarian, yet principled socialist politics.