Most of the reasons people think they can't do something are reasons they've created. Everything you do is up to you. Part of life is realizing that you have much more potential and ability than you'd ever know. However, it is up to you to reach inside, face the fears, and unleash that which really drives you.

Hay dos tipos de personas que te van a decir que tú no puedes lograrlo: aquellos que tienen miedo de intentarlo y aquellos que tienen miedo que tengas éxito. RAY GOFORTH, ESCRITOR

One of the main reasons people fail to reach their full potential is because they are unwilling to risk anything.

Podemos considerarlas como las tres puertas de acceso a un espectacular banquete. La primera puerta representa el sistema de creencias de una persona. Lo que una persona cree, lo que juzga factible o no, en gran medida determina lo que es capaz de hacer o no. Hay un antiguo dicho que reza: «Tanto si crees que puedes hacer una cosa como si no, tienes razón». Hasta cierto punto esto es cierto, ya que cuando uno considera que no puede hacer algo, envía a su sistema nervioso mensajes coherentes que limitan o suprimen su capacidad para hacer precisamente ese algo. Por el contrario, si envía usted a su sistema nervioso mensajes constantes y coherentes que reflejen la convicción de que puede hacerlo, éstos transmiten a su cerebro la señal para que produzca el resultado deseado y ello abre la posibilidad de hacerlo.

Those who lack confidence, for example, routinely make all sorts of faulty assumptions and poor inferences, assuming that they lack the competence, charisma, or talent to succeed in their careers or relationships.

Nobody achieves the impossible without thinking they can.

If you keep on being told you can’t do something, you’ll believe you can’t.

If we believe that it’s not possible to improve, then in reality it won’t be possible to improve. It’s extremely difficult to accomplish something when you don’t believe it can be done in the first place.

In fact, studies show that people are terrible at estimating their abilities.

People are distressed by their inability to do it. The problem, however, is simply that they don't do it.

One of the main reasons people fail to reach their full potential is because they are unwilling to risk anything. They are fearful of losing, failing, or getting hurt and just want to do the things they believe will keep them safe.

"Of course, figuring out what you like to work on doesn't mean you get to work on it. That's a separate question. And if you're ambitious you have to keep them separate: you have to make a conscious effort to keep your ideas about what you want from being contaminated by what seems possible.

It's painful to keep them apart, because it's painful to observe the gap between them. So most people pre-emptively lower their expectations. For example, if you asked random people on the street if they'd like to be able to draw like Leonardo, you'd find most would say something like "Oh, I can't draw." This is more a statement of intention than fact; it means, I'm not going to try. Because the fact is, if you took a random person off the street and somehow got them to work as hard as they possibly could at drawing for the next twenty years, they'd get surprisingly far. But it would require a great moral effort; it would mean staring failure in the eye every day for years. And so to protect themselves people say "I can't.

One of the most damaging and widespread social beliefs is the idea that most adults are incapable of learning new skills.

Don’t ever let someone else tell you what you are not capable of. With training, determination, and hard work you can eventually do anything you set your mind to. Remember, your beliefs are a choice. So make the choice to believe in yourself no matter what anyone else says.