The Bible says: "Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous. He that committeth sin is of the devil . . . Whosoever is born of God doth not commit sin . . . In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother." (1John 3:7-10)
Can Salvation Be Lost?

Proof that OSAS is false 
Sinning while under grace still results in death
Hebrews 10:26-29 shows that salvation can be lost by sin
Living according to the flesh results in death
Names can be blotted out of the Book of Life
Hebrews 6:1-12 shows that we must poduce fruit or be cursed 
Those who only believe for a while are not saved in the future
Romans 11:20-23 shows that salvation can be lost
Paul was concerned about losing his salvation
Galatians 5:1-4 shows that men can fall from grace
Those who belonged to the Lord can become lost (2 Peter 2:1-22)
Christians can become condemned again
Those who sin against the conscience will be lost
Christians may cease to be forgiven by God for their sins

Refuting alleged proof of OSAS
John 6:35-58 does not prove Once Saved Always Saved
John 10:28-29. Christ's sheep shall not perish
Romans 4:1-8 and justification without works
Romans 8:1 only teaches no condemnation to those in Christ
Romans 8:38-39 refers to suffering for Christ
1 Corinthians 3:15. Works burned up but man saved
1 Corinthians 5:5. Destruction of the flesh / spirit might be saved
Ephesians 2:8-9 does not prove Once Saved Always Saved
Ephesians 4:30 and what it means to be sealed by the Holy Spirit
Philippians 1:6 and how God is faithful to perform his part
Hebrews 13:5 – God will never leave nor forsake who?
1 John 2:19 does not prove Once Saved Always Saved
1 John 5:13 and those who "have" eternal life


 

Commentary on Romans 9

 

Romans 7:13-25

 

1 John 1:8