" Jesus has already paid the penalty. The work has been done. Are we to live good lives? Are we to do the best we can? Are we to think of others and live in peace? Of course! But to earn our salvation? Scripture is clear that we are saved by grace through faith, and that not of ourselves; not of works, lest anyone should boast. We live our lives in as righteous a manner as we can in thankful response to that priceless gift of God, our salvation, freely paid for on the cross by Christ himself. "

― Tim LaHaye , The Left Behind Collection