Purpose of the Book

³⁰ The disciples saw Jesus do many other miraculous signs in addition to the ones recorded in this book. ³¹ But these are written so that you may continue to believe^[a] that Jesus is the Messiah, the Son of God, and that by believing in him you will have life by the power of his name.

¹⁴ But you must remain faithful to the things you have been taught. You know they are true, for you know you can trust those who taught you. ¹⁵ You have been taught the holy Scriptures from childhood, and they have given you the wisdom to receive the salvation that comes by trusting in Christ Jesus. ¹⁶ All Scripture is inspired by God and is useful to teach us what is true and to make us realize what is wrong in our lives. It corrects us when we are wrong and teaches us to do what is right. ¹⁷ God uses it to prepare and equip his people to do every good work.