You Must Believe in Prayer

Mark 11:23-26 (King James Version)   ²³For 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.  ²⁴Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive them, and ye shall have them.  ²⁵And when ye stand praying, forgive, if ye have ought against any: that your Father also which is in heaven may forgive you your trespasses.  ²⁶But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.