Emotion vs critical thinking

As I study and do research surrounding Bertolt Brecht I find myself asking questions about how important is it to cause an emotion and make the audience think. The process of assisting to a theatrical tradition implies the experiencing of emotions, however some kinds of theatre don´t stop there, don´t just cause an emotion and leave it there, they transcend it making it just part of a larger process which ends up with reflection and, to some extend, critical thinking in the spectators, making them not only spectators but involving them in the production so they become observers.

With this contrast of emotion vs. critical thinking I wonder more about Brecht´s theories surrounding theatre, but at the same time the idea of these two elements going against each other is appealing when trying to apply it to art in general, and more so, in what differentiates art from simple entertainment. The main idea which about form all these reflections was that entertainment, just as the name states, entertains, centers on entertaining the public and possibly causing emotion while art produces emotion, produces an entertainment but transcends that provoking a reflection from the audience. However, I find this reflection is not complete, since the basic understanding I have of a theorist such as Artaud leads me to understand that the "theatre of cruelty" centers on causing an emotion, and so through the last statement, would that be simple and mere entertainment? would that cease to be art? Therefore I can only address this statement once i possess more knowledge regarding the subject.

Not only regarding theatre but art in general, what is the difference between art and entertainment, and is it possible for a branch of entertainment to develop into an art form? Can we say art is what produces a meditation, or reflection int he public while entertainment only centers on producing an emotion? Through the independent project I want to achieve this knowledge and hopefully get in touch furthermore with the cultural aspect behind theatre. To what extent is representing culture, or modern society, important in Brecht´s theories? That is the main objective i want to achieve, the thing I want to learn about the most out of all.