Mat 28:19  Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: 

Mat 28:20  Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.

Rom 10:17  So then faith cometh by hearing, and hearing by the word of God.

God`s will for man is in his holy word. The scriptures are our guide to salvation, and heaven. Man`s belief in God will only come thru hearing his word. Romans tells us how faith comes. Jesus is the word of God, he spoke all things God the father commanded him Heb 1:1-2 God gave Jesus all authority in heaven,and earth. Mat 28:16,17,18