Believers belong to the Lord and not to themselves, and that is why they are secure. An owner is responsible for his own possessions, so it is impossible for a true believer ever to be lost. However, a TRUE believer will never return to a sinful former lifestyle and STAY in that condition since the Holy Spirit now indwells him. "Quickie conversions" reap quick dropouts, but true belief endures to the end. Don't be deceived by satan's copycats. Read 1 John 2:3-8.