207"Rituals and ceremonies help define a culture. Without them, societies or groups of people have a diminished sense of who they are."
When we say that A help define B, we mean that A can help explain B and show something that is unique to B. Actually that exactly the relationship between rituals and ceremonies and the culture they belong to as they are typically formed in a long historical evolution together with the evolution of their culture. Whenever we attend a ceremony, we have experience unique in our culture. Through ceremonies and rituals people could observe the part of a
culture that is most different from other cultures and easily set this culture apart, that's the reason why rituals and ceremonies help define a culture. We can easily tell a Chinese wedding ceremony from a western ceremony and perceive something most representative of the two different cultures. Only a glance of the two ceremonies will inform us that they belong to two different cultures. The decorations used to decorate the ceremony, the dressing of the new couple, the procedures of the wedding, the meals served and even the blessings are so different. So ceremonies do help define a culture because they could perfectly help people distinguish a culture.
But how do we define ourselves? The answer is our culture. But that's too abstract and not practical. Practically, we define ourselves by identifying ourselves with those who share the same culture with us. Then how can we know with whom we share the same culture, by ceremonies and rituals. It's impossible for people of different culture to choose the same ceremony because of the obvious reason mentioned in the first paragraph. People choose to attend the ceremony choose the same culture, and they form a group or a society with the same culture. Whenever we attend a ceremony, we observe the people around us and the sense of who we are, which group we belong to are reinforced. Whenever we attend the flag raising ceremony, we define ourselves with our compatriots, the experience better tell one who he is and which country he belongs to than passport on which one's nationality is printed. Since ceremonies and rituals play such an important role in self-identification, I agree with the statement that without ceremonies and rituals, people's sense of who they are will be diminished.