Very useful article indeed. I wish it could be read by a majority of students of up to under-graduate standard so that most of them can benefit from this excellent work.
Now I am of age 81. However, during my days when I was student, I always studied to satisfy my inquisitive mind. In other words I never studied if I had no burning question in my mind. Looking back I feel that my attitude was very right and it was because of it that I could be a knowledgeable person and achieve success.