In the second sentence it has been said that "These are the values that are affirmed by the traditional democratic ideology". In the third sentence, he goes on to say that " The case of democracy is that". Had he not referred to two democratic concepts, he would have used the word "The" before the word "democracy" which is a rule in English language. Further, in the first sentence he declares that the ends of traditional democracy are human dignity and worth. While in the third sentence he counters that statement and refers to the rational and human values as ends of democracy. This makes his sentences contrasting that is why I have put the words "On the other hand" in my precis.