Satan went into the garden of God and deceived Eve telling her that they will not die if they eat the forbidden fruit.  Tactfully, Satan removed the fear of God from them.  Eve believed Satan, ate the fruit and convinced Adam also to eat the fruit without realizing what she was doing.  Thus, both have committed sin.  "Gen 2:17 But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die."  They both were punished by God for their sin. Their spirit of men which were even covering them as their glory had left them as they ate the forbidden fruit and so they found themselves naked.  They were spiritually dead at that point.    

Even now Satan goes to churches of God and deceives the preachers.  The message of Satan has not changed even today.  His main strategy is to remove the fear of God from the people so that they could sin.  He convinces the preachers that God will not eternally punish the congregation for disobedience against God.  So, the preachers preach the message of Satan to the congregation, without realizing what they are doing.  God will take vengeance on those who disobey him as he did it in the Garden of Eden.  "2Thes 1:8 In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ:" 

Through false preachers Satan spreads his messages.  "2Cor 11:14 And no marvel; for Satan himself is transformed into an angel of light. 15 Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness;" Satan preaches cunning and deceiving messages to remove the fear of God, from the people of God.  Satan convinces them that it is not possible to obey God.  So he advises them to flatter God and to praise God instead of obeying God. The devil is doing it in a cunning and crafty way.  "Matt 15:8 This people draweth nigh unto me with their mouth, and honoureth me with their lips; but their heart is far from me. 9 But in vain they do worship me, teaching for doctrines the commandments of men."  Since people want to believe, which is convenient for them rather than to believe the truth, even God will send them strong delusion so that they may believe a lie.  " 2Thes 2:10 ---; because they received not the love of the truth, that they might be saved. 11 And for this cause God shall send them strong delusion, that they should believe a lie."

But many workers are doing the work of the Lord for their own benefits in the world.  These benefits could be fame, prestige, pride, luxury, comfort, profession, or anything else other than eternal life and eternal rewards.  They should quit this work of the gospel for their own good.  "2 Peter 2:13 And shall receive the reward of unrighteousness, as they that count it pleasure to riot in the day time. Spots they are and blemishes, sporting themselves with their own deceivings while they feast with you; 14 Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children: 15 Which have forsaken the right way, and are gone astray, following the way of Balaam the son of Bosor, who loved the wages of unrighteousness;"  They pick up a few scripture verses and preach anything they want to preach without proper context.  They blaspheme God and preach lies. 

Some of these workers could have come to the work of the Lord with good intentions. But as the days went by they could have seen the fame, prestige, etc., and they could have backslid.  God will not tolerate them.  "Heb 6:4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, 5 And have tasted the good word of God, and the powers of the world to come,  Heb 10:26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, 27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries."  These verses are not referring to a new person trying to learn the things about salvation.  This person already has the knowledge of the word and he is willfully sinning, perhaps willfully embracing a false doctrine in order to justify his own sin.  "Heb 6:6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.  Heb 10:28 He that despised Moses' law died without mercy under two or three witnesses: 29 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?  If a person still lives in sin ignoring the warnings given him by the Spirit of grace, God charges him with the offence of trodden his son under foot, etc.  God considers this matter very seriously.