German reformer Martin Luther!
Introduced the word alone to emphasise his idea of the doctrine of salvation, which caused the split from the Roman Catholic Church over 400 years ago! But on reflection with modern technology and the easy grasp of Biblical languages today we now know that this is not correct?
Because of two incidents in the New Testament, where people were saved in the moment of belief and no mention of this doctrine exists in the Greeks texts, apart from that of the King James Bible!
The Thief on the cross and the Ethiopian eunuch made no known confession of faith, but they just believe and were saved?
Today many Christians are not aware of many things and Salvation seems cheap when its a card signed or a short prayer, yet perhaps we should not be quick to Judge since the almighty can do whatever He pleases!
James 2:17, 24, Greek Kata Strong G2596, Luke 23:42-43, Acts 8:27-39.