As a student or an academic, chances are you have a lot of work to do. Whether that is homework, studying for exams, preparing a presentation, writing a paper, doing research, or teaching, there is a lot that is asked of you. Often, the weeks seem like undulating waves, with regular spikes in work followed by brief periods of respite. This can lead to an unhealthy lifestyle if you are not careful with how you tackle your work.
When I’m learning a new topic, all of the details matter. If I want to understand what is going on, I need to have a firm handle on each detail. If I cannot imagine how each part operates and connects with the others, “getting” the concept is difficult. I suspect this happens for others, too. After all, if you want to understand without needing to take a result on faith, you have to know the concept as a whole.