Could Old Testament believers be lost?

Could Old Testament believers be lost?

Perhaps rephrasing the question will help in answering it. Were Old Testament saints saved by works, by mutual contract or covenant, or by grace? If their salvation was by grace, through the value of the Savior's death (and is there another way? Acts 4:12; Hebrews 9:22) then how could it be lost or be merely an intermittent relationship with God? The natural man cannot receive the things of the Spirit of God (1 Corinthians 2:14). The carnal mind is at enmity with God and those who are in the flesh cannot please God (Romans 8:7, 8). Therefore, to have understood truth from God, walked with God in fellowship or pleased God, believers in a past age must have become spiritually alive. How could they (or any saved person) revert to a condition of spiritual death? David's clear statement in Psalm 32:1 indicates the assurance he had of forgiveness and of an unchanging position before God that included no imputation of guilt by heaven's court (Romans 4:6, 7).

E. Higgins