Susanne K. Langer in "Expressiveness" uses analysis

Analysis is an effective tool to evaluate an issue. It is an intellectual process of reexamining the subject at hand. When we analyze an issue, we are involved in rethinking, reexamining, and rewriting the subject matter with necessary modification. Since analysis demands some intellectuality, we find that the philosophers and critical thinkers are more skillful in this job. Philosophical essays also use close analysis of the topic. Here, Susanne Langer has used close analysis because her subject matter is more philosophical. She talks about the inherent quality of art that can express human emotions. She says that both art and human emotions have similar form being formless. Art is congruent with human emotions. So, it is only art that can express human emotions. Her analysis of the form of art and human emotions is very effective. We find that most of the philosophical essays use close analysis. The use of analysis as a rhetorical strategy is very appropriate here. 

Langer analyzes the subjects one by one, point by point. She talks about one point at a time. In the beginning, she talks about different types of art such as designer’s art, painting, music, dance, poetry, fiction, drama, film, architecture, sculpture, etc. Then she talks about the common quality among them. So, she comes to talk about the expressiveness of art which is common among all. After that, she talks about the form of art and the form of human feeling. She says that both of them have same form. Both of them are congruent. She uses many examples and analogies to make us understand what form is. .Then, she again comes back to her point, expressiveness. Therefore, Langer has used point by point analysis of the subject. 

Some other rhetorical strategies of this essay are the topic of definition, analogy and some rhetorical questions. She has used some striking analogies here in this essay like the analogies of the lampshades, the analogies of hands and the analogies of the river. All of them clarify her concept of form of art and its congruency with human feelings. Finally, there are also some rhetorical questions on the second paragraph that draw our attention. She asks many questions here but they do not demand our answer.