Grace is truly amazing. This tells us so:
Philippians 2: Have this mind among yourselves, which is yours in Christ Jesus,  who, though he was in the form of God, did not count equality with God a thing to be grasped,  but made himself nothing, taking the form of a servant, being born in the likeness of men.  And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross.
Romans 5: For while we were still weak, at the right time Christ died for the ungodly.  For one will scarcely die for a righteous person—though perhaps for a good person one would dare even to die—  but God shows his love for us in that while we were still sinners, Christ died for us.  Since, therefore, we have now been justified by his blood, much more shall we be saved by him from the wrath of God.  For if while we were enemies we were reconciled to God by the death of his Son, much more, now that we are reconciled, shall we be saved by his life.  More than that, we also rejoice in God through our Lord Jesus Christ, through whom we have now received reconciliation.
And for two thousand years people have been used by God to put it to music. One of the greatest and best known testimonies of the amazing grace of God is – well, Amazing Grace. This rendition is simply – well – amazing in its own lesser way, but a real heart stirrer. I hope you enjoy it.