You have to believe in yourself first. If you don’t, no one else will. In his book An Iron Will Orison Swett Marden wrote:
The man without self-reliance and an iron will is the plaything of chance, the puppet of his environment, the slave of circumstances. Are not doubts the greatest of enemies? If you would [...]

Finding true success is never easy. Greatness only arrives when we overcome obstacles.
In his book “An Iron Will”, Orison Swett Marden Relates:
“It is all very well,” said Charles J. Fox, “to tell me that a young man has distinguished himself by a brilliant first speech. He may go on satisfied with his first triumph; but [...]