Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude.
This subject came up this weekend when our daughter who is getting ready to take an entrance exam to a private high school said she was sure she would do terrible on the math and history potions of the exam. We stopped her immediately and explained that even if she really felt that way she should not keep saying it. We instructed her to be positive about the test and keep telling herself and others that she would ace it!
Start today by visualizing your success in whatever task you are given. You might surprise yourself with the results!