Whenever I read some sort of text, like mathematics, the beginning is usually enticing and interesting enough to keep my attention.
And then it gets tough, and some things like abstract algebra gets very abstract quickly, the learning curve is fairly steep for someone with no guidance.
I then try to skim through it and see if I can find any beacon of light where I can latch onto or motivate me to persevere through the text.
For modern/abstract algebra, this will have to be Lagrange’s theorem which states that for any finite group G, the order of every subgroup H of G should divide the order of G.
I understand what it means, but I don’t think I truly appreciate it yet. Which means I will have to backtrack and see if I can get a better intuition through means of maybe drawing some pictures or construct a more complete picture (story) of group theory.