Ether 12:26-27

26 And when I had said this, the Lord spake unto me, saying: Fools mock, but they shall mourn; and my grace is sufficient for the meek, that they shall take no advantage of your weakness;

 27 And if men come unto me I will show unto them their weakness. I give unto men weakness that they may be humble; and my grace is sufficient for all men that humble themselves before me; for if they humble themselves before me, and have faith in me, then will I make weak things become strong unto them.

 28 Behold, I will show unto the Gentiles their weakness, and I will show unto them that faith, hope and charity bringeth unto me—the fountain of all righteousness.

 29 And I, Moroni, having heard these words, was comforted, and said: O Lord, thy righteous will be done, for I know that thou workest unto the children of men according to their faith;