Definition for "Believe":
to have confidence in the truth, the existence, or the reliability of something, although without absolute proof that one is right in doing so:
Personally, I hate the word "Believe". Who will believe a thing (s)he doesn't know fully? An uneducated person? Who doesn't have time to think and analyse about it deeply?
But you don't have to believe anything. Stop believing! start analyzing! ASk lot of questions!
If someone says your power is unlimited, start analysing it. Don't just believe because you need some advice! Try to understand if there is any logic behind it!
Try meditation! Read some good(?) books! Analyze without any beliefs! Do it with empty mind! Be open to truth! Enjoy your life!