Well, in one sense, I agree. Make sure you know what each line does on its own. But sometimes a single line doesn't make sense, in a larger sense, without som

Well, in one sense, I agree. Make sure you know what each line does on its own. But sometimes a single line doesn't make sense, in a larger sense, without something that comes later. So you have to have some tolerance for not understanding each line before you move to the next. It could be put in terms of knowing the "what" vs letting the "why" be uncertain a while.