To spread the Gospel of Jesus Christ,
Matthew 28:19
19Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:

...the message of His soon coming
1 Thessalonians 4:11-18
11And that ye study to be quiet, and to do your own business, and to work with your own hands, as we commanded you;
12That ye may walk honestly toward them that are without, and that ye may have lack of nothing.
13But I would not have you to be ignorant, brethren, concerning them which are asleep, that ye sorrow not, even as others which have no hope.
14For if we believe that Jesus died and rose again, even so them also which sleep in Jesus will God bring with him.
15For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep.
16For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
17Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord.
18Wherefore comfort one another with these words.

...and the truth of the Bible
II Timothy 3:16
16All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness:

...to all peoples in all nations
Acts 1:8
8But ye shall receive power, after that the Holy Ghost is come upon you: and ye shall be witnesses unto me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.

...using all available resources to bring Him honor and glory.
Colossians 1:18
18And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence.

* All verses taken from the King James Bible