why do you keep failling a particular course?
The brain loves to learn and the more you focus it on a particular subject; it sticks, becomes habitual through repetitive actions of the subject.
The brain has its limitations and likes; identify these and you can lead yourself, friends or children to taking the right courses and knowing why they consistently pass or fail certain courses. Never force your mind to make mirage decisions, stick to what it feels happy doing.
Love your mind