Perhaps you would be better served to read all of 1 John 5.
This is a great scripture, you should familiarize yourself with it.
10 Anyone who believes in the Son of God has this testimony in his heart. Anyone who does not believe God has made him out to be a liar, because he has not believed the testimony God has given about his Son. 1 1And this is the testimony: God has given us eternal life, and this life is in his Son. 12 He who has the Son has life; he who does not have the Son of God does not have life.
Ephesians 2:8For it is by grace you have been saved, through faithand this not from yourselves, it is the gift of God 9not by works, so that no one can boast. 10For we are Gods workmanship, created in Christ Jesus to do good works, which God prepared in advance for us to do.