Let's say you want to study X at university, but your parents force you to study Y. It is obvious that there will be feelings of hatred and resentment towards this decision, and it is even more obvious that this will make it difficult to study Y. The point here is that the biggest mistake we make when this kind of thing happens, and in general, is that we allow these psychological tensions to stay underneath and carry over throughout life. Consequently, the feelings and thoughts that derive from this, become bigger and bigger until there is a breaking point; you perform less, you start hating your parents, etc. The most interesting and stupid thing is that much of this tension could be resolved if that person would just sit down in complete stillness, have an honest dialogue with himself and say:
“I hate this”.
This simple stupid and absurd act relieves a great deal of pain, and allows for quicker detachment and consequent progress, because unprocessed feelings will trap you in the past, not allowing you to move on.