“Truly I say to you, whoever says to this mountain, ‘Be taken up and cast into the sea,’ and does not doubt in his heart, but believes that what he says is going to happen, it will be granted him. Therefore I say to you, all things for which you pray and ask, believe that you have received them, and they will be granted you.”
Mark 11.23-24 (NASB1995)

The greatest enemy of faith is fear. The more your faith grows the less fear you will have. All kinds of books have been written on how to get rid of fear, but I believe your focus is not to get rid of fear, but rather to grow your faith.

To do this, you need to let God move into your brain. He wants to fill your thoughts with His thoughts. In other words, get the Bible into your mind and this will change the way you think, and if you change the way you think, you will change the way you act. Proverbs 23:7 says, “As a man thinketh in his heart, so is he.”  Learn to think like God thinks, think abundantly, think exceedingly. It has been said, “Show me how you think, and I will show you your future.” Stop speaking about how big your mountain is, but instead, start speaking to your mountain about how big God is.