Helaman 6:5

yea, and many did preach with exceeding great power and authority, unto the bringing down many of them into the depths of humility, to be the humble followers of God and the Lamb.

Many preached with great power. They helped many people become humble followers of God and the Lamb.

They preached with tremendous power and authority, bringing many people to their knees in humility, ready to follow God and the Lamb.