It is another, third thing in which opposites are in a systematic relation with each other. Notion is to be regarded in the first instance simply as the third to being and essence , to the immediate and to reflection . Motion is therefore, contradiction. Since opposites constitute a unity they are related to each other systematically, that is, systematicity is result of contradiction. Hence, the concepts are in motion.
Dialectics can begin only if there is contradiction, motion is always in contradiction.
Everything is the result of prime mover and everything is in motion. Unity is the first step of constituting system, for that reason motion is the key to find the opposite of any concepts. I think the concepts of contradiction replace the concept of time, leaving it as a quantity, or magnitude of number of oscillation of a pendulum. The Notion of time is contradiction. Secondly, again contrary to linear character of formal logic, dialectical logic is circular.