In life we are often hit by events that send us parking as we wonder what would be our fate. Many will eventually resort to denial and other defensive mechanism to justify their state.
One of the important points to note is that the challenge or a stumbling block that stands between you and success should serve as a motivating tool rather than a disappointing one. Take for instance an Engineer who is a toddler in the field. He will, on many occasions, fail to achieve what his instructors want but with time he will learn from his failures and stand out to be the best.