Plant the seeds of expectation in your mind; cultivate thoughts that anticipate achievement. Believe in yourself as being capable of overcoming all obstacles and weaknesses Norman Vincent Peale
Believe you can, and you can. Belief is one of the most powerful of problem dissolvers. When you believe that a difficulty can be overcome, you are more than halfway to victory over it already. Norman Vincent Peale at wikipedia
Any fact facing us is not as important as our attitude toward it, for that determines our success or failure. Norman Vincent Peale - his bio at wikipedia