I believe that there are two essential motivators to be successful. One of the biggest motivators for me is doubt. People are always going to doubt you, no matter what you're doing. Whether you're starting a business, writing a book, going to college, or even starting a workout plan. There is always someone who is going to say "you can't" or "you won't". The amazing thing is that I've begun to fall in love with the doubt.
I love hearing someone tell me that I can't or won't do something. When they say those things to me, they're just unknowingly added fuel to my fire. I thrive on doubt. The doubt pushes me to work harder because not only am I passionate, but now you have challenged me and I am going to prove you wrong. So you, yes you reading this, let them keep doubting you! Stop talking to them and trying to convince them that you can do it. Get to work and move in silence, because in the end, they'll all see.
My other biggest motivator is rejection. Whether it be rejection from my peers, a job, a scholarship, or an internship. I used to hate the word no, but then I learned that when I hear the no that God is either telling me "not yet" or that he has something greater for me. There will be 1,000 doors that won't open, but the one door that does open will be the right one. Rejection has taught me that I am not in control, and that is perfectly okay, because if I were in control who knows where I would be.
Recently, I came across a scripture, Psalms 118:22, which says "The stone that the builders rejected has now become the cornerstone." So, yes they may reject you, and yes they may count you out but remember that your opinion of you is the only one that matters. The cornerstone is the most important part of the building, and when it is out of line, so is the building. You control how you view yourself. Let them count you out. But, always remember that no matter what they say about you and what you can't do, you are the cornerstone.