"I'm never going to be able to do this job; I'm just not smart enough."

"Why does my boss want me to present at the trade show? I'm a terrible public speaker, and I'll just embarrass the company."

"I wish I could stick up for myself at work. In every meeting, I let the others walk over my ideas. I'm never going to get ahead."

Many of us have negative thoughts like these, sometimes frequently. When we think like this, our confidence, mood and outlook can become negative, too.

The problem with negative thoughts is that they can become self-fulfilling prophecies. We talk ourselves into believing that we're not good enough. And, as a result, these thoughts drag down our personal lives, our relationships, and our careers.

But, if we deliberately do the opposite and use positive thoughts about ourselves, the effect can be just as powerful but far more helpful.

In this article, we'll explore how you can use affirmations to drive positive change in your career, and in your life in general.

Source: Mindtools