Romans 10:15
“And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!”
For whosoever shall call upon the name of the Lord shall be saved.
How then shall they call on him in whom they have not believed? and how shall they believe in him of whom they have not heard? and how shall they hear without a preacher?
And how shall they preach, except they be sent? as it is written, How beautiful are the feet of them that preach the gospel of peace, and bring glad tidings of good things!
But they have not all obeyed the gospel. For Esaias saith, Lord, who hath believed our report?
So then faith cometh by hearing, and hearing by the word of God.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“How beautiful upon the mountains are the feet of him that bringeth good tidings, that publisheth peace; that bringeth good tidings of good, that publisheth salvation; that saith unto Zion, Thy God reigneth!”
“Behold upon the mountains the feet of him that bringeth good tidings, that publisheth peace! O Judah, keep thy solemn feasts, perform thy vows: for the wicked shall no more pass through thee; he is utterly cut off.”
“And your feet shod with the preparation of the gospel of peace;”
“Behold upon the mountains the feet of him that bringeth good tidings, that publisheth peace! O Judah, keep thy solemn feasts, perform thy vows: for the wicked shall no more pass through thee; he is utterly cut off.”
“And came and preached peace to you which were afar off, and to them that were nigh.”