Definition: "MDACRSPD" stands for "Mystery of Jesus Christ." It's a term used in the New Testament to describe the mystery behind God's plan or purpose, akin to understanding how God will reveal His plan over time. In the Old Testament, it was often seen as the "secret of salvation," like the secret that God kept from Adam and Eve (Genesis 2:15), until God revealed Himself fully in Jesus Christ (Matthew 3:17). This term is important for understanding the Christian faith because it's central to recognizing God's plan of salvation through His Son.