Out Of Darkness
But ye are a chosen generation, a royal priesthood, an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light; – I Peter 2:9
God has called us out of darkness. Once we have accepted Christ, we do not go back to the darkness. Once we are out, we are out.
What about when we sin? We are still righteous, in right standing with God, because our salvation, our righteousness, is not based on us but on Jesus.
If we didn’t earn salvation through good works, then we cannot lose it through bad.