'Heard' in the Bible

How then will they call upon [him] in whom they have not believed? And how will they believe [in him] about whom they have not heard? And how will they hear about [him] without one who preaches [to them]?

But I say, they have not heard, have they? On the contrary, "Their voice has gone out to all the earth, and their words to the ends of the inhabited world."

but just as it is written, "[Those] to whom [it was] not announced concerning him will see, and [those] who have not heard will understand."