378
Both what is reasonable and what is unreasonable have to undergo the like contradiction.
379
Dialectic is the culture of the spirit of contradiction, which is given to man that he may learn to perceive the differences between things.
380
With those who are really of like disposition with himself a man cannot long be at variance; he will always come to an agreement again. With those who are really of adverse disposition, he may in vain try to preserve harmony; he will always come to a separation again.