To me, it expresses the need to pay attention to what you are learning, and decide which things to retain and which to discard. E.g. one student takes a course in Scala and memorizes the code for generics, while the other writes the code but focuses on understanding the notion of polymorphism and what it is good for.
I genuinely don't understand this comment.
Happy New Year! Here's the latest and greatest installment of rationality quotes. Remember: