Typically in collage what happens is this. We will have six months in one semester. Will have exam at end of semester (external exam) and at end of each month (internal exam). In internal exam syllabus will be of that month. Means in first month whatever you learn that only will be asked in first internal exam. While in second internal exam whatever you have learnt in second month that only will be asked in second internal. Means syllabus will not be cumulative. It will be partitioned. So in second internal exam you need not to know anything about first internal exam.
But life does not take exam in this way. Exam of life is cumulative. In exam of life, You need to have knowledge of exam you had given previously. Your learning of first exam will be tested in forthcoming exams as well. Forth coming exam syllabus will be first exam learning + some thing more.
In collage exams syllabus will not be cumulative. In second internal exam you need not to know anything about first internal exam. While exam of life is cumulative. Forth coming exam syllabus will be previous exams learning + some thing more.
You can not escape out of any situation. Life will keep on teaching you same lesson until you master that lesson and gain some skill out of that. When you don't learn lesson from problem, that problem will re-surface time to time. Problem will become repetitive. As you are not learning a lesson, as you are not improving yourself, as you are not equipped enough knowledge life will not allow you to move forward.
In ancient time, one story is there. Here I am describing it. Once upon a time there was a ghost who was blessed to gain energy from another person. Condition was this : if ghost defeats a person, defeated person’s energy will by gained by ghost. So ghost will fight with a person. If ghost wins, energy of loosing person will be added in ghost’s reservoir of energy. Initially he has gained energy by fighting against small small person. He has chosen his opponent carefully and gained enough amount of enegy. He mastered the skill required to defeat small person. His reservoir of energy was increasing. He continued defeating small person, gaining their energy repeatedly. Than he choose fight against big one. And need not to say that he won.
If ghost defeats a person, defeated person’s energy will by gained by ghost. It will be added in ghost's existing reservoir of energy
Moral of the story : TBD. (Readers can post a comment about moral of the story.)