Define Success to properly set your compass on your definite purpose.

I found one day in school a boy of medium size ill-treating a smaller boy. I expostulated, but he replied: The bigs hit me, so I hit the babies; that's fair. In these words he epitomized the history of the human race.
- Bertrand Russell

“All you need in this life is ignorance and confidence; then success is sure. ”
― Mark Twain

 
"In the confrontation between the stream and the rock, the stream always wins
- not by strength but by perseverance."
- H. Jackson Brown 

 “Don't mistake activity with achievement.”
― John Wooden

 “Supreme excellence consists of breaking the enemy's resistance without fighting.”
― Sun Tzu, The Art of War 

“Whatever the mind can conceive and believe, it can achieve.”
― Napoleon Hill, Think and Grow Rich

“Don't aim at success. The more you aim at it and make it a target, the more you are going to miss it. For success, like happiness, cannot be pursued; it must ensue, and it only does so as the unintended side effect of one's personal dedication to a cause greater than oneself or as the by-product of one's surrender to a person other than oneself. Happiness must happen, and the same holds for success: you have to let it happen by not caring about it. I want you to listen to what your conscience commands you to do and go on to carry it out to the best of your knowledge. Then you will live to see that in the long-run—in the long-run, I say!—success will follow you precisely because you had forgotten to think about it”

― Viktor E. Frankl, Man's Search for Meaning

“I want to do it because I want to do it. Women must try to do things as men have tried. When they fail, their failure must be but a challenge to others.”
― Amelia Earhart

“Over the years, I have come to realize that the greatest trap in our life is not success, popularity, or power, but self-rejection. Success, popularity, and power can indeed present a great temptation, but their seductive quality often comes from the way they are part of the much larger temptation to self-rejection. When we have come to believe in the voices that call us worthless and unlovable, then success, popularity, and power are easily perceived as attractive solutions. The real trap, however, is self-rejection. As soon as someone accuses me or criticizes me, as soon as I am rejected, left alone, or abandoned, I find myself thinking, "Well, that proves once again that I am a nobody." ... [My dark side says,] I am no good... I deserve to be pushed aside, forgotten, rejected, and abandoned. Self-rejection is the greatest enemy of the spiritual life because it contradicts the sacred voice that calls us the "Beloved." Being the Beloved constitutes the core truth of our existence.”

― Henri J.M. Nouwen