Culture give a group of people a unique way of thinking about values, ideas, moralities. All of those aspects of culture give human an understanding of how the world works and how they live and act in their own environment. The development of a certain kind of culture leads to the appearance of the rituals and ceremonies. Otherwise, the rituals and ceremonies represent the spirit of a kind of culture. I agree that ritual and ceremonies is an important part of the culture. However, its disappearance won't necessarily cause the decline in sense of who we are.
 
To begin with, there’s no doubt that the rituals and the ceremonies play an important role for culture. It represents the traditional spirit of culture. Take the Autumn Festival as an example. On this festival, any member of a family --old or young, male or female, all will try his or her best to come back to his hometown to have a dinner together with his family no matter how busy he or she is and how far away he or she goes away. From the joy of the dine party, we are aware of why the ancestors laid emphasis on the unity and affection. Likely, on the Dragon Boat Festival which is designed to commemorate an ancient Chinese patriotic poet Qu Yuan, we learn the integrity and patriotism of our ancestor by reviewing the legend of zongzi. Meanwhile, the traditional spirit give us pride for what we are.
 
However, the disappearance of rituals and ceremonies themselves cannot be the reason of the decline in the sense of who we are. An appropriate example is not far to seek. The Jewish people, whose country had been destroyed since the attack of the Roma in about 60 BC, had been forced to live a vagrant live for almost 1800 years. During this period of time, they have to live in an environment filled with other culture, and they certainly cannot keep their rituals and ceremonies. But they never forget who they are. Instead, they found their own country in 1948. Such a marvel shows that even if people have to live without their rituals and ceremonies, their sense of who they are won't fade away.
 
As long as we hold the strong sense of identification with our country, we may even feel more clearly who we are without rituals and ceremonies. Only when we are put in an environment filled with other culture, can we treasure and miss our own culture which we take pride in. The depressed feelings on our heart will intensify the sense of who we are. In other hand, if we lack the love for our own culture, we may regard the rituals and ceremonies as a custom of no sense and become indifferent about who we are.
 
To sum up, although there is no denying the fact that the rituals and ceremony is important part of culture, the sense of who we are depends on the inner sense of identification with our culture, instead of the rituals and ceremonies.