Luke 1:3-4

it seemed good to me also, having followed carefully all things from the beginning, to write unto thee consecutively, O most noble Theophilus,

1 Peter 3:15

but sanctify the Lord Christ in your hearts: being always ready for an answer to every one asking you a reason for the hope which is in you, but with meekness and fear:

John 20:31

and these have been written in order that you may believe that Jesus Christ is the Son of God; and in order that believing you may have life through His name.

1 John 5:13

I have written these things unto you, in order that you may know that you have eternal life; to those who believe on 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

Bible References

I

Luke 1:3
it seemed good to me also, having followed carefully all things from the beginning, to write unto thee consecutively, O most noble Theophilus,
John 20:31
and these have been written in order that you may believe that Jesus Christ is the Son of God; and in order that believing you may have life through His name.
1 John 5:13
I have written these things unto you, in order that you may know that you have eternal life; to those who believe on the name of the Son of God.

Answer

1 Peter 3:15
but sanctify the Lord Christ in your hearts: being always ready for an answer to every one asking you a reason for the hope which is in you, but with meekness and fear: