The term "Great Apostasy" refers to a significant falling away from faith or a widespread rejection of religious beliefs, particularly in the context of Christianity. This concept is often derived from passages in the New Testament, most notably 2 Thessalonians 2:3, which speaks of a "falling away" (Greek: "apostasia") that must occur before the Day of the Lord. The apostasy is viewed as a critical event characterized by moral decay, doctrinal corruption, and a departure from the truth of the Gospel.Biblical scholars and theologians interpret the Great Apostasy as a prophetic indication of a future time when many will abandon their faith, aligning with the warnings found in other scriptures such as Matthew 24:10-12, where Jesus foretells that many will turn away from the faith and betray one another due to lawlessness. This theme is also echoed in the writings of the early Church Fathers and later Christian literature, which emphasize the importance of vigilance and adherence to sound doctrine in the face of such challenges. The Great Apostasy serves as a call for believers to remain steadfast in their faith and to uphold the truth of Scripture amidst growing deception.