The hardest tests in life is the patience to wait for the right moment.
Two of the hardest tests in life: The patience to wait for the right moment and the courage to accept that you've waited for nothing.
“The two hardest tests on the spiritual road are the patience to wait for the right moment and the courage not to be disappointed with what we encounter.”― Paulo Coelho
There's more to life than passing exams, and paper qualifications can only take you so far. A lot depends on luck, and on being in the right place at the right time, which was certainly true in my case.
If you fail an examination, it means you have not yet mastered the subject. With diligent study and understanding, you will succeed in passing the exams.
Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.