pescador said in post #257:
There is a huge difference between being a servant and being a son (read son or daughter throughout).
Are you thinking of Galatians 4:7?
If so, note that Galatians 4:7 means Christians aren't only God's servants but are His children. For Christians are God's servants (Romans 6:22, Philippians 1:1; 2 Timothy 2:24). People can be both someone's child and his servant at the same time (Malachi 3:17, Exodus 4:23). Revelation is given to the Church (Revelation 22:16), God's servants (Revelation 22:6, Revelation 1:1) who will forever serve God (Revelation 22:3) with His name written on their forehead (Revelation 22:4, Revelation 3:12-13).
Also, being children of God doesn't mean once-saved-always-saved. For while Christians are the children of God (Galatians 4:6-7, Romans 8:16; 1 John 3:1, John 1:12), they can still ultimately lose their salvation, such as by refusing to repent from a sin (Hebrews 10:26-29; 1 Corinthians 9:27, Luke 12:45-46). For under the letter of the Old Covenant Mosaic law, a father was commanded to have even his own son stoned to death if his son refused to repent (Deuteronomy 21:18-21). And under the New Covenant, God will ultimately punish unrepentant sin even more sorely than He did under the letter of the Old Covenant Mosaic law (Hebrews 10:26-29).
pescador said in post #257:
The slave must obey commands and live in fear of punishment.
Note that Christians are commanded to fear God (1 Peter 2:17, Luke 12:5, Hebrews 12:28-29; 2 Corinthians 7:1, Ephesians 5:21, Acts 9:31). They must remain in fear of being cut off the same as non-Christians if they don't continue in God's goodness (Romans 11:20-22, Luke 12:45-46). They must work out their own ultimate salvation with fear and trembling (Philippians 2:12b; 1 Peter 1:17, Romans 2:6-8), knowing the terror of the future judgment of Christians by Jesus Christ (2 Corinthians 5:10-11) at His Second Coming, when some Christians will end up losing their salvation because of unrepentant sin (Luke 12:45-46, Hebrews 10:26-29), or unrepentant laziness (Matthew 25:26,30, John 15:2a), or apostasy (Mark 8:35-38, Hebrews 6:4-8).
Satan would love to deceive Christians into not having this fear of God, for Satan knows it's the lack of a fear of God which keeps people in unrepentant sin (Psalms 36:1, Psalms 10:13), and that it's by the fear of God that people depart from sin (Proverbs 16:6b, Proverbs 14:27, Proverbs 3:7). And Satan can make his deceptions appear as if they're on the side of good (2 Corinthians 11:14), when in fact his deceptions reject the sound doctrine of the Bible (1 Timothy 4:1; 2 Timothy 4:3-4), when the whole Bible is taken into consideration, instead of just taking a verse by itself and trying to misapply it (e.g. Matthew 4:6).
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Some Christians mistakenly think they shouldn't have any fear of God, because they misunderstand, for example, 1 John 4:18 and 2 Timothy 1:7.
But it's only if Christians perfectly love God that they won't misbehave (1 John 5:3, John 14:21-24), and so they won't have any fear of any impending punishment from God for any misbehavior (1 John 4:18). But if they become so wicked they lose their fear of God (Psalms 36:1, Psalms 10:13), and so continue to misbehave without repentance, they do need to fear impending punishment from God in the form of temporal chastening (Hebrews 12:6). And if they refuse to repent even after receiving temporal chastening (Revelation 3:19, Revelation 2:21), they need to fear God's ability to cast them into hell (Luke 12:5) for their unrepentant misbehavior (Hebrews 10:26-29, Luke 12:45-46).
Also, when 2 Timothy 1:7 says God hasn't given Christians the spirit of "fear", the original Greek word (G1167) means "timidity", and the context means a Christian isn't to be timid before people (cf. Proverbs 28:1) because he's ashamed of the Gospel of Jesus Christ (2 Timothy 1:8) or afraid of suffering affliction from people for preaching the Gospel (2 Timothy 1:8b, Luke 12:4, Hebrews 13:6). So 2 Timothy 1:7 means God hasn't given Christians the spirit of the fear of people (Proverbs 29:25, Matthew 10:28). God has given Christians the Spirit of the fear of God (Matthew 10:28b, Isaiah 11:2, Romans 11:20-22, Romans 2:6-8, Philippians 2:12b; 1 Peter 1:17, 1 Peter 2:17, Hebrews 10:26-29, Hebrews 12:28-29, 2 Corinthians 7:1, Ephesians 5:21, Acts 9:31). But Christians can nonetheless wrongly employ their free will to quench God's Holy Spirit within them (1 Thessalonians 5:19), and so they can wrongly lose their fear of God (Romans 11:20-22).