All scripture is God breathed and is useful for teaching, rebuking, correcting, and training in righteousness.

But These are written that you may believe that Jesus is the Christ, The son of God,and that by believing you may have life in his name

For I am convinced that neither death nor life, neither angels nor demons, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation, will be able to separate us from the love of God that is in Christ Jesus our Lord.

He came to that which was his own, but his own did not receive him. Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God.