Hello PF people. It's my first post here, but I have been lurking around this forum for awhile now. I'm currently learning differential calculus using a text by Stewart and I want to attain a better comprehension of pure mathematics. My question is: would it be a good idea to get another text to supplement Stewart and gain a deeper understanding of how limits work using the epsilon-delta definitions at this stage of my education? or would this be a waste of time (meaning, is it better to finish integral calculus and vector calculus, then start analysis)?