The only difference between those who spend eternity in Heaven and those who opt for Hell is the object of their faith. Putting complete confidence in Jesus' shed blood as the Son of GOD sacrificed for the sin of the world results in everlasting life. Rejecting Jesus' sacrifice outright or attempting to earn grace from GOD through religious or volunteer work results in us keeping the eternal death we inherited from Adam's fall.
Blameless On Judgment Day But Guilty As Sin is an amazing devotional journey to understanding how to approach GOD with complete peace of mind with the sin conscious mindset left at the foot of Jesus' cross.