Scriptural Basis

Go ye therefore, and teach all nations… teaching them to observe all things whatsoever I have commanded you…
Matt. 28:19,20

...Go ye into the world, and preach the gospel to every creature.
Mk. 16:15

But if our gospel be hid, it is hid to them that are lost...
II Cor. 4:3

The Lord gave the word: great was the company of those that published it.
Ps. 68:11

Awake to righteousness, and sin not; for some have not the knowledge of God: I speak this to your shame.
I Cor. 15:34

So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper in the thing whereto I sent it.
Isa. 55:11