The doctrine that the Bible is all of God’s word falsely implies that God can no longer speak to man, that He no longer has the ability or the intent to communicate with his children, that his work is finished. The current state of wickedness in the world clearly demonstrates that the Lord is not yet finished with his work. He hasn’t given up on his children—and he never will.
This doctrine concludes that God is a changeable being, that although he spoke with prophets and revealed new truths throughout time, his pattern of behavior has changed. Yet the Lord told Malachi, I am the Lord, I change not (Mal 3:6). And from Hebrews, Jesus Christ the same yesterday, and to day, and for ever (Heb 13:8).
Therefore if the words and works of God have ceased among the children of men it must be a reflection on the people not on the Lord. Moroni explains:
’…has the day of miracles ceased?
Or have angels ceased to appear unto the children of men? Or has he withheld the power of the Holy Ghost from them? Or will he, so long as time shall last, or the earth shall stand, or there shall be one man upon the face thereof to be saved?
Behold I say unto you, Nay; for it is by faith that miracles are wrought; and it is by faith that angels appear and minister unto men; wherefore, if these things have ceased wo be unto the children of men, for it is because of unbelief, and all is vain.’ (Moroni 7:35-37)