D&C 121

While the Prophet Joseph Smith suffered in Liberty Jail, the Lord declared - 

Cursed are all those that shall lift up the heel against mine anointed, saith the Lord, and cry they have sinned when they have not sinned before me, saith the Lord, but have done that which was meet in mine eyes, and which I commanded them.

17 But those who cry transgression do it because they are the servants of sin, and are the children of disobedience themselves."  (Doctrine and Covenants 121:16–17)

I believe this applies to many in this day.

He also promised - 

God shall give unto you knowledge by his Holy Spirit, yea, by the unspeakable gift of the Holy Ghost, that has not been revealed since the world was until now;

27 Which our forefathers have awaited with anxious expectation to be revealed in the last times, which their minds were pointed to by the angels, as held in reserve for the fulness of their glory;

28 A time to come in the which nothing shall be withheld, whether there be one God or many gods, they shall be manifest.

29 All thrones and dominions, principalities and powers, shall be revealed and set forth upon all who have endured valiantly for the gospel of Jesus Christ."  (Doctrine and Covenants 121:26–29)

In my mind, those who believe that the Bible is it are fools.