After Ye Are Baptized with Water, I Will Baptize You with Fire and with the Holy Ghost

Below are some of the words spoken by the resurrected Savior to a group of Lehi’s descendants. They had congregated at one of their temples, after a massive natural upheaval, when the Lord descended from heaven to bless and teach them.

“…Blessed are ye if ye shall give heed unto the words of these twelve whom I have chosen from among you to minister unto you, and to be your servants; and unto them I have given power that they may baptize you with water; and after that ye are baptized with water, behold, I will baptize you with fire and with the Holy Ghost; therefore blessed are ye if ye shall believe in me and be baptized, after that ye have seen me and know that I am. And again, more blessed are they who shall believe in your words because that ye shall testify that ye have seen me, and that ye know that I am. Yea, blessed are they who shall believe in your words, and come down in the depths of humility and be baptized, for they shall be visited with fire and with the Holy Ghost, and shall receive a remission of their sins.” (3 Nephi 12:1-2)

Questions:

-Are there twelve who have been chosen to minister to the world in our time?

-Did they receive their authority from a line of priesthood directly instituted by Jesus Christ himself?

-Why does Christ speak of those who did not see him in person, but believed the words of those who did see Him in person, as being more blessed? -What are the depths of humility?