Nuggets from An Urgent Call to a Serious Faith by Dave Hunt – Five Basic Truths about Grace and ...

First of all, we must be absolutely clear that these two can never mix. Paul declares, “If by grace, then is it is no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace, otherwise work is no more work” (Romans:11:6And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then is it no more grace: otherwise work is no more work.
See All...). Salvation cannot be partly by works and partly by grace. These two are opposites and cannot be in partnership.

Secondly, we must be absolutely certain that works have nothing to do with salvation. Period. The Bible clearly states, “For by grace are ye saved…not of works” (Ephesians:2:8-9 [8] For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: [9] Not of works, lest any man should boast.
See All...). True to such scriptures, evangelicals firmly declare that we cannot earn or merit salvation in any way. Eternal life must be received as a free gift of God’s grace, or we cannot have it, for “the gift of God is eternal life” (Romans:6:23For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord.
See All...). Any attempt at even a partial payment for a gift is a rejection of the gift.

Thirdly, salvation cannot be purchased even in part by us because it requires payment of the penalty for sin – a payment we can’t make. If one receives a speeding ticket, it won’t help to say to the judge, “I’ve driven many times within the 55 mph limit. Surely my many good deeds will make up for the one bad deed.”  Nor will it do to say, “If you let me off this time, I promise never to break the law again.” The judge would reply, “Never to break the law again is only to do what the law demands. You get no extra credit for that. The penalty must be paid.” Thus Paul writes, “By the deeds of the law there shall no flesh be justified in his sight” (Romans:3:20Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.
See All...).

Fourthly, if salvation from the penalty of breaking God’s laws cannot be earned by good deeds, then it cannot be lost by bad deeds. Our works play no part in either earning or keeping salvation. If we had to merit keeping the gift, it would not be a gift.

Fifthly, salvation can only be given to us as a free gift if the penalty has been fully paid. We have violated infinite justice, requiring an infinite penalty. We are finite beings and could not pay it; we would be separated from God for eternity. God is infinite and could pay an infinite penalty, but it wouldn’t be just, because He is not a member of our race. Therefore God, in love and grace, through the virgin birth, became a man so that He could pay the debt of sin for the entire human race.

In the Greek, tetelestai, Christ’s cry from the cross, “It is finished!” is an accounting term. In Christ’s day, it was stamped upon invoices and promissory notes as proof of full satisfaction. Christ thus declared that the sinner’s debt to divine justice had been paid in full. Justice had been satisfied by full payment of its penalty, and thus God could “be just, and the justifier of him which believeth in Jesus” (Romans:3:26To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.
See All...). On that basis, God offers pardon and eternal life as a free gift. He cannot force it on anyone or it would not be a gift. Nor would it be just to pardon a person who rejects the righteous basis and offers a hopelessly inadequate payment instead – or offers his works even as partial payment.