it is very simple, which is what makes it so hard to grasp. it is faith. faith is everything.
Mark 11:23
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.
remember, paul said faith without works is dead. if a person believes something, they think as if and act as if it is true. if they dont do this, they dont believe it, no matter what they say.