The Gospel, Perseverance & Assurance - Dropbox

Conclusion
The promise of salvation has the
necessary condition that the believer hold
fast to the gospel to the end. This
perseverance is promised to be
accomplished by God for all genuine
believers. If a person does not persevere,
he was never truly converted.
Perseverance is God's continuing work of
salvation that He has begun in a believer.