Revelation 14:9 And the third angel followed them, saying with a loud voice, If any man worship the beast and his image, and receive his mark in his forehead, or in his hand, 10 The same shall drink of the wine of the wrath of God, which is poured out without mixture into the cup of his indignation; and he shall be tormented with fire and brimstone in the presence of the holy angels, and in the presence of the Lamb
Persons who will be tasked with delivering the third angel’s message would need to be as “bold as a lion” because the import of the message states in no uncertain terms, that life as we know on planet earth will to come to an end permanently, and that against everything which science and philosophy are saying.
Persons will need a ton of bravery and a confidence born of God to stomach the fallout from preaching the third angels’ message, for it essentially predicts that the judgement in heaven is soon to be closed, and as such, it will bring civilization, as we know it to an end. Not many heads of state in their right minds would be happy to hear this, because this news could only be received in the positive, if it is accompanied by a change of heart, and a radical turn-about to join the ranks of God’s commandment-keeping people.
So yes, it would call for the convergence of all the byproducts of faith in God, including bravery, and confidence on the part of those who will be tasked with delivering the final message. The message also states that God will do His act, His strange act, by doing that which the prophets of the day have hardly ever portrayed, or even mentioned to the people as being one of God’s characteristics.
Jeremiah 30:6 Ask ye now, and see whether a man doth travail with child? wherefore do I see every man with his hands on his loins, as a woman in travail, and all faces are turned into paleness? 7 Alas! for that day is great, so that none is like it: it is even the time of Jacob's trouble, but he shall be saved out of it.
May God add His blessing to the study of His word. “Good night” and God bless!