The Word of God speaks for itself.

Psalm 19:7-11
The law of Jehovah is perfect, restoring the soul:
The testimony of Jehovah is sure, making wise the simple.

The precepts of Jehovah are right, rejoicing the heart:
The commandment of Jehovah is pure, enlightening the eyes.

The fear of Jehovah is clean, enduring forever:
The ordinances of Jehovah are true, and righteous altogether.

More to be desired are they than gold, yea, than much fine gold;
Sweeter also than honey and the droppings of the honeycomb.

Moreover by them is thy servant warned:
In keeping them there is great reward.

The Word is from God and profitable to all mankind.

2 Timothy 3:16-17
Every scripture inspired of God is also profitable
for teaching, for reproof, for correction,
for instruction which is in righteousness:
that the man of God may be complete, furnished
completely unto every good work.

It only needs us to carry that message to the entire world.

Mark 16:15
And he said unto them, Go ye into all the world,
and preach the gospel to the whole creation.