Sound speech, that cannot be condemned; that he that is of the contrary part may be ashamed, having no evil thing to say of you.
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
 So then faith cometh by hearing, and hearing by the word of God. But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world. But I say, Did not Israel know? First Moses saith, I will provoke you to jealousy by them that are no people, and by a foolish nation I will anger you.  But Esaias is very bold, and saith, I was found of them that sought me not; I was made manifest unto them that asked not after me. But to Israel he saith, All day long I have stretched forth my hands unto a disobedient and gainsaying people.
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.
1 Peter 1:23
Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
 Now the parable is this: The seed is the word of God.
 Those by the way side are they that hear; then cometh the devil, and taketh away the word out of their hearts, lest they should believe and be saved.
 They on the rock are they, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation fall away.
 And that which fell among thorns are they, which, when they have heard, go forth, and are choked with cares and riches and pleasures of this life, and bring no fruit to perfection.
 But that on the good ground are they, which in an honest and good heart, having heard the word, keep it, and bring forth fruit with patience.
(note: The prison guard in Acts 16 heard strong sound doctrine which Paul preached.)
 And brought them out, and said, Sirs, what must I do to be saved?
 And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house.
 And they spake unto him the word of the Lord, and to all that were in his house.
And when he had brought them into his house, he set meat before them, and rejoiced, believing in God with all his house.
 For whosoever shall call upon the name of the Lord shall be saved.
The LORD is nigh unto all them that call upon him, to all that call upon him in truth.
Sanctify them through thy truth: thy word is truth.
Romans 10: 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.
 But I say, Have they not heard? Yes verily, their sound went into all the earth, and their words unto the ends of the world.
 And Philip ran thither to him, and heard him read the prophet Esaias, and said, Understandest thou what thou readest?
 And he said, How can I, except some man should guide me? And he desired Philip that he would come up and sit with him.
 The place of the scripture which he read was this, He was led as a sheep to the slaughter; and like a lamb dumb before his shearer, so opened he not his mouth:
 Then Philip opened his mouth, and began at the same scripture, and preached unto him Jesus.
1 Corinthians 15:
 Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures:
1 Corinthians 4:
 I write not these things to shame you, but as my beloved sons I warn you.
 For though ye have ten thousand instructors in Christ, yet have ye not many fathers: for in Christ Jesus I have begotten you through the gospel.
I beseech thee for my son Onesimus, whom I have begotten in my bonds:
 Of his own will begat he us with the word of truth, that we should be a kind of firstfruits of his creatures.
 Wherefore, my beloved brethren, let every man be swift to hear, slow to speak, slow to wrath:
 For the wrath of man worketh not the righteousness of God. Wherefore lay apart all filthiness and superfluity of naughtiness, and receive with meekness the engrafted word, which is able to save your souls.