Hi As I am venturing in graduate level mathematics, I am having a recurring problem; I keep getting stuck in the abstraction of it. Usually it involved set theory; I never get "fluent" in it. However, the main problem is abstraction. For instance, this semester I had topology, and the curriculum was from chapters 1, 2, 3, 4, 7 and 9 in Munkres. I was stuck in chapter 2 for ages. The fundamental group was no big problem since it is very visual. Metric spaces and function spaces were not much of a problem either. However, the biggest problem I had was the quotient space. I never got through the section about it. I could not get further than a few pages, although I tried. I seem to be able to think in terms of groups, metric spaces and even specific topological spaces. However, when chapters get more abstract than that, the book loses me completely. All of my knowledge about set theory comes from introductory chapters in books about metric spaces, algebra and topology. Should I read a book on set theory specifically? Should I just move onto more intuitive subjects like partial differential equations? Or, is there a way to overcome this problem?