The Sin Unto Death (1 John 5:16-18, COD 5 RE 4, 5)

John tells us that if we see someone sin we should pray for that person provided that they are not committing the sin unto death. This can result in us being concerned that maybe we committed the sin unto death and we might wonder if we are saved. The assurance that we have is that if we are concerned about committing the sin unto death then we need to be confident that we did not commit the sin.