Analysis of information sources in references of the Wikipedia article "Dialectic" in English language version.
the necessity of the connectedness and the immanent emergence of distinctions must be found in the treatment of the fact itself, for it falls within the concept's own progressive determination. What propels the concept onward is the already mentioned negative which it possesses in itself; it is this that constitutes the truly dialectical factor. [...] It is in this dialectic as understood here, and hence in grasping opposites in their unity, or the positive in the negative, that the speculative consists.