In the Bible, the book of John mostly talks about the life of Jesus and His mission on earth.
A new commandment I give you, that you love one another; as I loved you...—John 13:34
We must love one another as God's children. We must show love to eachother and help one another out. We must forgive and show mercy like Jesus had shown us.
And this is the will of Him who sent Me, that everyone who sees the Son and believes in Him may have everlasting life; and I will raise him up at the last day.—John 6:40
As sinners, we were destined to punishment. But by the grace of God, He gave everlasting life to those who believe in Jesus.