Atonement Through the Blood
Atonement means to cover over.
The word "atonement" is used only once in the N.T. (Ro 5:11). A corresponding N.T. word is "propitiation" (1Jo 2:2; 4:10; Ro 3:25), which means satisfaction, as when a debt is satisfied and paid in full. The Greek word translated "propitiation" (hilasmos) is also translated "mercy seat" in Heb 9:5.
Atonement speaks of the price which was demanded by God's just law for man's sin. The blood and death of Christ were the ALL-SUFFICIENT payment which satisfied that demand, so that now the believing sinner is set at liberty (Mt 20:28; 2Co 5:21; 1Co 6:20; Is. 53:4-6; Heb 9:12,28).