This song is the work of John Newton. As for the original song, it is not clear, because it is a rural gospel song in the United States, and Christians all over the world are singing it. But I prefer Hayley Westenra and Akiba Reiko.
The following is taken from Baidu Encyclopedia:
Amazing grace (translated into Chinese as amazing grace, or God's Grace) is the most popular rural gospel song in the United States, and it is also a song sung by Christians all over the world, and is regarded as a Christian hymn. This song was originally composed by British pastor John Newton in 1779. It was originally a traditional folk song, or black soul song, which expressed religious loyalty and contained a simple and profound atonement story. It became a song that Christians must sing every time they prayed for repentance. Later, it became more and more popular, surpassing religion and becoming a real pop song and a classic song for people to pray for peace. It is a hymn to the people's spiritual world, and the theme of the song is the same as that of the Bible: repentance, gratitude, atonement and rebirth. You can hear this sacred, peaceful, solemn and beautiful song on any solemn occasion, at ceremonies, in many pop music records, at national ceremonies and at the funeral of former US President Ronald Reagan.
Amazing grace is a hymn written in18th century. The lyrics were written by John Newton John Newton, a British white man who was born in London in 1725. The lyrics are concise, full of confessions of piety and gratitude, and they are also the testimony of his life. John Newton was the leader of a slave, who did many evils, but later he was exiled to Africa. In a stormy sea, he was saved by God, so he decided to repent thoroughly and devoted his life to spreading the gospel of God, becoming a great preacher in the19th century. Before he died, he wrote an epitaph for himself: "Pastor John Newton was once a man who had committed a crime and didn't believe in God. He used to be a slave in Africa. But through the abundant mercy of the Lord Jesus Christ, he was kept, reconciled with God, forgiven his sins, and was appointed to preach the gospel. " This poem bears witness to his life's salvation. This song is full of his remorse for the past slave trade and gratitude to God. Nevertheless, God still bless him.
John Newton (John Newton)
Lyrics: John Newton
Composers: James P. Karel, David S. Clayton
Adapted by Edwin exel
This touching amazing grace is actually a hymn, which is sung by many western singers. Grace originally meant "grace and grace", and here it is interpreted as "God's mercy and grace to mankind".