Dictionary meaning of possibilities means potentiality for favorable or interesting results.  There is a room where is no space for a word ‘impossible’. If you enter in this room you will realize you can do that you consider impossible. Now question? Where is this room? Answer. Your’s inner power. You know we are weak until we feel. Once we raise our determination to achieve our goal, instead of obstacles we put our efforts till meet the destination. Nobody is perfect. Even when experts do extraordinary things, they also need learning. May be the learning power of person to person is different. Some need less efforts or vise versa. But for success there is only one mantra ‘hard work with 100% determination’.