Struggling Sinners and Saints (Romans 8:18-25 (COD Head 5 Article 1)

There is no doubt that one would not be saved apart from the grace of God.  I think all Christians who have a grasp of Christianity would affirm the necessity of grace for our salvation.  We know that we are those who need grace, but how much grace do we need?  Is 90 percent enough or do we need more?  Is our confidence in that we will not fall away because we love the Lord enough or is it because know that the Lord loves us enough?