A person is sealed unto the day of redemption when they are led of the Holy Spirit, for if you do not have the Spirit of Christ you are none of His, but not everybody that claims Jesus as Lord allows the Spirit to lead them.
Many are called, but few are chosen, and Jesus said not everyone that says Lord will be able to enter heaven for they were workers of iniquity, for they enjoyed sin and thought they were right with God.
2Ti 2:19 Nevertheless the foundation of God standeth sure, having this seal, The Lord knoweth them that are his. And, Let every one that nameth the name of Christ depart from iniquity.
The Lord knows them that are His having this seal, which this is what seals the saints, and how they are led of the Spirit, that everyone that names the name of Christ has to depart from iniquity.
1Co 15:33 Be not deceived: evil communications corrupt good manners.
1Co 15:34 Awake to righteousness, and sin not; for some have not the knowledge of God: I speak this to your shame.
To be led of the Spirit a person has to hate sin, and do not want sin, but some do not have the knowledge of God.
Rom 11:20 Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:
Rom 11:21 For if God spared not the natural branches, take heed lest he also spare not thee.
Rom 11:22 Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.
If a saint does not continue in the goodness of God then they will be cut off like the Jews that did not obey the truth in the Old Testament were cut off.
Heb 3:7 Wherefore (as the Holy Ghost saith, To day if ye will hear his voice,
Heb 3:8 Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:
Heb 3:9 When your fathers tempted me, proved me, and saw my works forty years.
Heb 3:10 Wherefore I was grieved with that generation, and said, They do alway err in their heart; and they have not known my ways.
Heb 3:11 So I sware in my wrath, They shall not enter into my rest.)
Heb 3:12 Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.
Heb 3:13 But exhort one another daily, while it is called To day; lest any of you be hardened through the deceitfulness of sin.
God said for the saints to not act like the Jews in the wilderness, and to not depart from the living God by the deceitfulness of sins.
So there is no difference between the Old Testament and the New Testament, for you obey the truth or else you will be cut off from salvation.
Isa 59:1 Behold, the LORD'S hand is not shortened, that it cannot save; neither his ear heavy, that it cannot hear:
Isa 59:2 But your iniquities have separated between you and your God, and your sins have hid his face from you, that he will not hear.
Because it is our sins that separate us from God whether we claim Christ or not.
Gal 5:16 This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
Gal 5:17 For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
Gal 5:18 But if ye be led of the Spirit, ye are not under the law.
Gal 5:22 But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,
Gal 5:23 Meekness, temperance: against such there is no law.
Gal 5:24 And they that are Christ's have crucified the flesh with the affections and lusts.
Gal 5:25 If we live in the Spirit, let us also walk in the Spirit.
1Co 10:12 Wherefore let him that thinketh he standeth take heed lest he fall.
1Co 10:13 There hath no temptation taken you but such as is common to man: but God is faithful, who will not suffer you to be tempted above that ye are able; but will with the temptation also make a way to escape, that ye may be able to bear it.
If a person hates sin, and does not want sin, then by the Spirit they can abstain from sin, for a Spirit led life will not fulfill the lusts of the flesh, for they crucified the flesh with the affections, and lusts, and show the ways of the Spirit in which there is no ways of the flesh there.
And God will not allow them to be tempted above what they can handle, and will give them an escape from the temptation so they can endure it.
So there is no excuse why a person cannot abstain from sins by the Spirit.
2Ti 3:4 lovers of pleasures more than lovers of God;
2Ti 3:5 Having a form of godliness, but denying the power thereof: from such turn away.
2Ti 3:6 For of this sort are they which creep into houses, and lead captive silly women laden with sins, led away with divers lusts,
2Ti 3:7 Ever learning, and never able to come to the knowledge of the truth.
But some people that claim Christ have a form of godliness, but deny the power thereof, from such people turn away, and they are ever learning, and never able to come to the knowledge of the truth, for they will not allow the Spirit to lead them so they are not sealed unto the day of redemption, which they hold unto sin and think they are right with God.
Which are the people that say they cannot abstain from sins, and sin does not affect their relationship with God, which they testify out of their own mouths that they sin for they say they cannot cease from sins, which means they hold unto sin so they cannot be led of the Spirit.
For those in the truth know they can abstain from sins by the Spirit, and believe they have to abstain from sins as the Bible says they have to do.
But these people that say they cannot abstain from sins want to say they are sealed unto redemption, but you are not sealed unto redemption until you are led of the Spirit which a Spirit led life can abstain from sins.
The Bible says they are lovers of pleasures more than lovers of God, and we see that among them in society, for they say they love God, but they love fleshy pleasures more, enjoying the world like the world enjoys the world.
Rom 13:10 Love worketh no ill to his neighbour: therefore love is the fulfilling of the law.
Love is the fulfilling of the law.
1Co 13:13 And now abideth faith, hope, charity, these three; but the greatest of these is charity.
Charity, love in action, is greater than faith.
Gal 5:6 For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.
Faith works by love.
No charity, no faith.
Paul said without charity they have erred from the faith, and they are nothing, and James said their faith is dead, and John said the love of God does not dwell in them.
1Co 13:4 Charity suffereth long, and is kind; charity envieth not; charity vaunteth not itself, is not puffed up,
1Co 13:5 Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil;
1Co 13:6 Rejoiceth not in iniquity, but rejoiceth in the truth;
1Co 13:7 Beareth all things, believeth all things, hopeth all things, endureth all things.
Love is kind, and is not arrogant, does not behave wrongly, is not selfish, does not think evil, and does not rejoice in iniquity to enjoy sins, but rejoices in the truth to abstain from sins by the Spirit, and does not go by their wants, but only by their needs, and to help others with their needs if possible.
But there are people that say they cannot abstain from sin, and sin does not affect their relationship with God, and then say they are sealed unto the day of redemption, but they cannot be led of the Spirit with such an attitude.
When we receive the Spirit, and are led of the Spirit, then we are sealed unto the day of redemption, but there are many who claim Christ that are not led of the Spirit which you can tell by their beliefs, and their lifestyle, and then say they are sealed unto the day of redemption.