Sense of crisis means when you are in a comfortable situation and can’t feel anything bad would happen, but you have to have the feeling that the comfortable situation would not last forever and you need to make preparation in advance. Do not ignore it. It is very important and necessary. It is common that people are easy to get lost and get used to while they are in a comfortable situation for a long time. When something happens, they will lose their head. It will be hard for them to deal with. For example, Lucy is very good at English. With the talent in English, she only need to put a little attention on that subject, she can get be the No. 1. Then she is very proud and never work hard on that subject. However, she finds that she is not in the first place for a long time, and several classmates have done better than her. The result of her is because she does not have the sense of crisis.