The ordination of the Twelve Apostles marked the inauguration of an advanced epoch in the earthly ministry of Jesus, an epoch characterized by the organization of a body of men invested with the authority of the Holy Priesthood, upon whom would rest, more particularly after the Lord's departure, the duty and responsibility of continuing the work He had begun, and of building up the Church established by Him. The word "apostle" is an Anglicized form derived from the Greek _apostolos_, meaning literally "one who is sent," and connoting an envoy or official messenger, who speaks and acts by the authority of one superior to himself. In this sense Paul afterward applied the title to Christ as one specially sent and commissioned of the Father.[513] The Lord's purpose in choosing and ordaining the Twelve is thus enunciated by Mark: "And he ordained twelve, that they should be with him, and that he might send them forth to preach, and to have power to heal sicknesses, and to cast out devils."[514] For a season following their ordination the apostles remained with Jesus, being specially trained and instructed by Him for the work then before them; afterward they were specifically charged and sent forth to preach and to administer in the authority of their priesthood, as shall be hereafter considered. NOTES TO CHAPTER 16. 1. Judas Lebbeus Thaddeus.--This Judas (not Iscariot) is designated in the authorized version of Luke 6:16, and Acts 1:13, as "_the brother_ of James." That the words "the brother" are an addition to the original text is indicated by italics. The revised version of these passages reads in each instance "_the son_ of James," with italics of corresponding significance. The original reads "Judas of James." We are uninformed as to which James is referred to, and as to whether the Judas here mentioned was the son, the brother, or some other relative of the unidentified James. 2. The Meaning of "Apostle."--"The title 'Apostle' is likewise one of special significance and sanctity; it has been given of God, and belongs only to those who have been called and ordained as 'special witnesses of the name of Christ in all the world, thus differing from other officers in the Church in the duties of their calling' (Doc. and Cov. 107:23). By derivation the word 'apostle' is the English equivalent of the Greek _apostolos_, indicating a messenger, an ambassador, or literally 'one who is sent'. It signifies that he who is rightly so called, speaks and acts not of himself, but as the representative of a higher power whence his commission issued; and in this sense the title is that of a servant, rather than that of a superior. Even the Christ, however, is called an Apostle with reference to His ministry in the flesh (Hebrews 3:1), and this appellation is justified by His repeated declaration that He came to earth to do not His own will but that of the Father by whom _He was sent_.