Those of us who believe in the eternal security of the believer (Christ keeps those who are truly his) are not soft on sin (as we are accused of being). We don’t encourage people living in sin to believe that because they claim to have once made a decision for Christ they are secure. Much less would we offer assurance of salvation to one who has renounced his professed faith in Christ. The only difference is that we would say that such a person never was saved, while they say he lost his salvation.
"What shall we say then? Shall we continue in sin, that grace may abound? God forbid. How shall we, that are dead to sin, live any longer therein?"