

Ever think of human beings as a subject???
If everyone around you is a subject, who will you score A in??
Being so confident in subject A, you decided to leave that subject and the shelf and start to study another subject B. Will you still score in subject A?
Everyone needs time and effort to understand each other. Subject syllabus changes and so do people. If you think that you once understand the person and there's no need to continue studying it, perhaps you need to think twice.