Matthew 4:18-22 and Romans 10:9-18

Matthew 4:18-22
18 And Jesus, walking near the Sea of Galilee, saw two brothers, Simon who is called Peter, and his brother Andrew, casting a net into the sea (for they were fishermen).
19 And he said to them: "Follow me, and I will make you fishers of men."
20 And at once, leaving behind their nets, they followed him.
21 And continuing on from there, he saw another two brothers, James of Zebedee, and his brother John, in a ship with their father Zebedee, repairing their nets. And he called them.
22 And immediately, leaving their nets and their father behind, they followed him.
Romans 10:9-18
9 For if you confess with your mouth the Lord Jesus, and if you believe in your heart that God has raised him up from the dead, you shall be saved.
10 For with the heart, we believe unto justice; but with the mouth, confession is unto salvation.
11 For Scripture says: "All those who believe in him shall not be confounded."
12 For there is no distinction between Jew and Greek. For the same Lord is over all, richly in all who call upon him.
13 For all those who have called upon the name of the Lord shall be saved.
14 Then in what way will those who have not believed in him call upon him? Or in what way will those who have not heard of him believe in him? And in what way will they hear of him without preaching?
15 And truly, in what way will they preach, unless they have been sent, just as it has been written: "How beautiful are the feet of those who evangelize peace, of those who evangelize what is good!"
16 But not all are obedient to the Gospel. For Isaiah says: "Lord, who has believed our report?"
17 Therefore, faith is from hearing, and hearing is through the Word of Christ.
18 But I say: Have they not heard? For certainly: "Their sound has gone forth throughout all the earth, and their words unto the limits of the whole world."