The title of the article "Learn to sell yourself" is the central argument of the article. Using the method of comparative analysis, we can get two arguments with opposite contents: (1) Learning to sell yourself can create opportunities for you to display your talents and serve your country, thus realizing your own life value; (2) If you don't sell yourself, you will only miss the goddess of opportunity, thus leaving a regret that you are rich in knowledge and skills. The above is a comparison from the aspect of promoting their own functions. By comparing the attitude of selling oneself, we can form two sub-arguments: (1) Dare to sell one's exercise ability and cultivate a healthy mentality of self-confidence and self-improvement; (2) Don't dare to betray yourself easily, which leads to a bad mentality of cowardice and inferiority. By comparing the ways of selling yourself, we can form two sub-arguments: (1) Backed by strength, correctly selling yourself can win the respect of others and social recognition; (2) Without the arrogance of real talent and learning, showing off yourself will lose the trust of others, leaving a laughing stock of "the golden jade is outside, but the defeat is among them". There are many angles of comparative analysis. We can choose a set of arguments to organize writing according to the needs of writing. It should be noted that the sub-arguments formed by comparative analysis must come from the same angle, and several sub-arguments from different angles and levels cannot be mixed together.