Romans 10:14-17 NKJV How then shall they call on Him in whom they have not believed? And how shall they believe in Him of whom have not heard? And how shall they hear without a preacher?
And how shall they preach unless they are sent? As it is written; "How beautiful are the feet of those who preach the gospel of peace, Who bring glad tidings of good things!"
But they have not all obeyed the gospel. For Isaiah says, "Lord, who has believed our report?"
So then faith comes by hearing, and hearing by the word of God.
Romans 15:18-21 NKJV For I will not dare to speak of any of those thing which Christ has not accomplished through me in word and deed, to make the Gentles obedient--
in mighty signs and wonders, by the power of the Spirit of God, so that from Jerusalem and around about to Illyricum I have fully preached the gospel of Christ.
And so I have made it my aim to preach the gospel, not where Christ was named, lest I should build on another man's foundation,
but as it is written; "To whom He was not announced, they shall see; And those who have not heard shall understand."
Isaiah 52:13-15 NKJV Behold, My Servant shall deal prudently; He shall be exalted and extolled and be very high.
Just as many were astonished at you, So His visage was marred more than any man, And His form more than the sons of man;
So shall He sprinkle many nations. Kings shall shut their mouths at Him; For what had not been told them they shall see, And what they had not heard they shall consider.