For verily I say unto you, That whosoever shall say unto this mountain, Be thou removed, and be thou cast into the sea; and shall not doubt in his heart, but shall believe that those things which he saith shall come to pass; he shall have whatsoever he saith. Mark 11:23 KJV
Jesus taught His disciples regarding the power of words. There are laws of the supernatural realm and one of them is the law of speech. Words have creative power and the natural world obeys them. After all, everything that exists was spoken into being by our Creator.
Speaking words of faith will always bring about the thing spoken, if you faint not. Your words are the path upon which you walk out your life. This is especially true when you speak the Word of God.