One must cultivate self-belief in ones abilities and credentials. It is a must to have a great level of self esteem and a high level of self image. All great achievers and thinkers are blessed with great confidence levels and this is what motivates them to give in their 100 % efforts in any particular direction so as to accomplish any goal. Those who dont have any level of self-confidence and self-belief can never attain any accolades in life. You have to be your best friend, understand your strengths and weaknesses and work upon them. Every person should believe in himself or herself to make the most of his life. In the words of Norman Vincent Peale, Believe in yourself: Have faith in your abilities; without a humble but reasonable confidence in your own powers you cannot be successful or happy.