Proverbs 22:21

to make thee know the certainty of the words of truth, that thou may carry back words of truth to those who send thee?

Luke 1:3-4

it occurred to me also, having followed closely from the beginning all things accurately, to write to thee in order, eminent Theophilus,

1 Peter 3:15

but sanctify the Lord God in your hearts. And always be ready for a defense to every man who asks you a word about the hope in you, with mildness and fear.

John 20:31

But these are written, so that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life in his name.

1 John 5:13

I wrote these things to you, those who believe in the name of the Son of God, so that ye may know that ye have eternal life, and that ye may believe in the name of the Son of God.

Treasury of Scripture Knowledge

Summary

That I might make thee know the certainty of the words of truth; that thou mightest answer the words of truth to them that send unto thee?

Answer

General references

Bible References

I

Luke 1:3
it occurred to me also, having followed closely from the beginning all things accurately, to write to thee in order, eminent Theophilus,
John 20:31
But these are written, so that ye may believe that Jesus is the Christ, the Son of God, and that believing ye may have life in his name.
1 John 5:13
I wrote these things to you, those who believe in the name of the Son of God, so that ye may know that ye have eternal life, and that ye may believe in the name of the Son of God.

Answer

1 Peter 3:15
but sanctify the Lord God in your hearts. And always be ready for a defense to every man who asks you a word about the hope in you, with mildness and fear.

General references

Proverbs 18:20
A man's belly shall be filled with the fruit of his mouth. With the increase of his lips he shall be satisfied.