Ephesians 1:3-14
3 Praised be Adonai, Father of our Lord Yeshua the Messiah, who in the Messiah has blessed us with every spiritual blessing in heaven.
4 In the Messiah he chose us in love before the creation of the universe to be holy and without defect in his presence.
5 He determined in advance that through Yeshua the Messiah we would be his sons — in keeping with his pleasure and purpose —
6 so that we would bring him praise commensurate with the glory of the grace he gave us through the Beloved One.
7 In union with him, through the shedding of his blood, we are set free — our sins are forgiven; this accords with the wealth of the grace
8 he has lavished on us. In all his wisdom and insight
9 he has made known to us his secret plan, which by his own will he designed beforehand in connection with the Messiah
10 and will put into effect when the time is ripe — his plan to place everything in heaven and on earth under the Messiah’s headship.
Here is why we are sealed since conception. God is the one who forms each one in the womb. Since all these verse above declare that before union with Christ, we are sealed, as all are in the Lamb's book of life.
The verses below are after redemption, union in Christ:
11 Also in union with him we were given an inheritance, we who were picked in advance according to the purpose of the One who effects everything in keeping with the decision of his will,
12 so that we who earlier had put our hope in the Messiah would bring him praise commensurate with his glory.
13 Furthermore, you who heard the message of the truth, the Good News offering you deliverance, and put your trust in the Messiah were sealed by him with the promised Ruach HaKodesh,
14 who guarantees our inheritance until we come into possession of it and thus bring him praise commensurate with his glory.
The Calvinist view is that only those in union with Christ have all of the above and only them. This is now the mystery revealed. Satan wanted us to think it was only that way, and John Calvin unconsciously set in motion a doctrine that would turn many from the truth, and accept a strong delusion for Satan's own desire. Saying that God does not save the whole world is the lie and deception of Satan himself. Just like in Job, God allowed Satan to wound the church and give the church boils and pain just like God allowed Job to experience.
God says all were sealed since birth by the Holy Spirit. Because those in union were sealed then, not on the day they turned from sin and destruction. It is not our choice it was God’s choice before we were born of flesh which is the first birth. Being born again, we accept that seal already there.