Romans 10:14-18

14 How then will they call on him in whom they have not believed? How will they believe in him whom they have not heard? How will they hear without a preacher?
15 And how will they preach unless they are sent? As it is written: "How beautiful are the feet of those who preach the Good News of shalom, Who bring glad tidings of good things!"
16 But they didn't all listen to the glad news. For Yesha`yahu says, "Lord, who has believed our report?"
17 So faith comes by hearing, and hearing by the word of God.
18 But I say, didn't they hear? Yes, most assuredly, "Their sound went out into all the eretz, Their words to the ends of the world."