What Must A Saved Person Do To Be Lost Again?

I had a preacher (who believes Once Saved Always Saved) ask me recently, if a saved person can lose his salvation, what must he do to be lost again? I suggested to him the following passages which directly answer his question …Heb 3:1,12,14 “Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus ... Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God ... For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end”· so if a holy brother, one who has partaken of the heavenly calling, develops an evil heart of unbelief and departs from God, he is no longer a partaker of ChristRev 3:5 “He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels.”· so one whose name is in the book of life (a saved person), who does not overcome (temptation and/or persecution), his name will be blotted out of the book of life – meaning he goes from saved to lostGal 5:4 “Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace.”· so a Christian who tries to be justified by the old testament law falls from graceII Pet 2:20-22 “For if after they have escaped the pollutions of the world through the knowledge of the Lord and Saviour Jesus Christ, they are again entangled therein, and overcome, the latter end is worse with them than the beginning. For it had been better for them not to have known the way of righteousness, than, after they have known it, to turn from the holy commandment delivered unto them. But it is happened unto them according to the true proverb, The dog is turned to his own vomit again; and the sow that was washed to her wallowing in the mire.”· so a person who has escaped the sins of the world thru the knowledge of Christ, is entangled back again into the sins of the world, it will be worse for him than if he had never been saved to start withJames 5:19-20 “Brethren, if any of you do err from the truth, & one convert him; Let him know, that he which converteth the sinner from the error of his way shall save a soul from death, and shall hide a multitude of sins.”· so a brother in Christ who errs from the truth and is not converted back, his soul will dieI Cor 9:27 “But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.”· so if Paul didn’t keep his body under subjection he would become a castaway/reprobate (“rejected by God and beyond hope of salvation” – Random House)I Tim 5:12 “Having condemnation, because they have cast off their first faith.”· so if a Christian casts off his faith, he is condemnedII Pet 1:5-11 “And beside this, giving all diligence, add to your faith virtue; and to virtue knowledge; And to knowledge temperance; and to temperance patience; and to patience godliness; And to godliness brotherly kindness; and to brotherly kindness charity. For if these things be in you, and abound, they make you that ye shall neither be barren nor unfruitful in the knowledge of our Lord Jesus Christ. But he that lacketh these things is blind, and cannot see afar off, and hath forgotten that he was purged from his old sins. Wherefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall: For so an entrance shall be ministered unto you abundantly into the everlasting kingdom of our Lord and Saviour Jesus Christ.”· so if a Christian (one purged from his sins) does not add what we call the Christian graces, he falls and loses out on the everlasting kingdomHeb 10:26-27 “For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.”· so if a Christian sins willfully he has a judgment of fiery indignation to look forward toII Chron 15:2 “… The Lord is with you, while ye be with him; and if ye seek him, he will be found of you; but if ye forsake him, he will forsake you.”· so if an old testament saint forsook God, God would forsake himJohn 15:2,6 “Every branch in me that beareth not fruit he taketh away: and every branch that beareth fruit, he purgeth it, that it may bring forth more fruit. … If a man abide not in me, he is cast forth as a branch, and is withered; and men gather them, and cast them into the fire, and they are burned.”· so if one in Christ does not bear fruit / does not abide in Christ, he is taken away, cast forth, and cast into the fire