Faith is the bond of friendship between people, and faith is the cornerstone of social morality. However, today's society is full of selfishness and only seeks happiness for personal interests. Many people have lost their faith and the principle of being a man. On faith, we have to say that Qian Xuesen is a world-famous great scientist. His faith transcends the bondage of money. His faith exceeded his own value, because with faith, China had an atomic bomb, and China became rich and strong. Because of his beliefs, he gave up a lot of exciting money and a well-fed life in the United States, but the American government prevented him from returning to China and even put him in prison by the most despicable means. With strong faith, he overcame all kinds of difficulties in prison and finally returned to the motherland. People can't lack faith. Faith is an individual's life value orientation. Because of this belief, Lei Feng did many good things to help others. People remember Lei Feng only to find the lost faith. Nowadays, people lack faith, become slaves of money, are self-centered and don't care about society and others. The lack of faith has caused a crisis of trust! For example, melamine was detected in Sanlu milk powder and Sudan red was detected in eggs. Such things abound. Why did this happen? The point is that these people believe in money first. Does the development of the motherland today need a selfless scientist like Qian Xuesen, and does Lei Feng have lofty beliefs and selfless spirit? Faith is priceless and life is priceless. Man's life is limited, but his beliefs are infinite. If you lose faith, your life will become a walking corpse. Faith is a banner of life, and faith is the cornerstone of everyone's happy life. People need faith in their hearts. Only when everyone has faith in his heart, life will not be confused, life will be more exciting and society will be more progressive. May faith remain in people's hearts forever!