Tell yourself that you are going to succeed and repeat it several times a day. With the time passing, one day you are going to be surprised with where you will be standing, this may be on the first step, in the middle or at the final round of your own road of success.
Only then, your dreams, your plans, your goal and your whole life is going to be worthy in the eyes of yours. Then, you will understand the meaning of defeating the fear, doing the impossible, opening the locked doors and you will believe that what you believe in is what you become and what you whisper to yourself with no one hearing everyday is what builds your inner strength or your out-most fear.
Just believe in yourself.