You must be in fellowship prior to your Bible study, so that the spiritual information you receive can become a source, of blessing to your soul and produce spiritual growth.
30 And[kai] grieve[lupeo] not[me] the holy[hagios] Spirit[pneuma] of God,[theos] whereby[en][hos] ye are sealed[sphragizo]
unto[eis] the day[hemera] of redemption.[apolutrosis]KJV-Interlinear
30 And do
not grieve the Holy Spirit of God, by whom you were sealed for the day of
redemption. NASB
The Holy Spirit is not only the agent or power by which our spiritual life functions, but the Holy Spirit is the seal also of our spiritual lives.
This is not to say that the Holy Spirit made a seal, or did the sealing, but is actually himself, the seal.
When legal correspondence or documents are affixed with some sort of seal, as in a wax with a ring imprint, then that document becomes a part of a permanent and legal record. It cannot be changed, or altered, or removed from the permanent record.
And in this regard, God used Himself, the Holy Spirit, to actually seal our eternal life in us, and that cannot be removed, altered, or changed in any way.
Unto the day of redemption, means the complete recovery of our body, from corruption to incorruption. That is the day when we receive our resurrection bodies, and will have those bodies forever.
Unbelievers do not have a day of redemption. They have a day of judgment. Only believers have a day coming when they will receive their resurrection bodies and live with the Lord forever.
Redemption is a concept that originated long ago when property came under a lien or some sort of financial burden, wherein it required money to buy back or to pay off the debt and thus redeem the property back to a debt or burden free state.
In the spiritual life, that concept carried through with the purchase price that Christ paid on the Cross, thus releasing sinners from the burden or debt imposed by sin and the spiritual death that accompanied it.
There are three concepts regarding redemption. There is the day of the actual payment, which occurred at the Cross. There is the actual day of the guarantee, which it the moment that you believe in Christ and thus are sealed with the Holy Spirit, which in turn guarantees that redemption is yours. And, there is the day of the actual redemption, when you receive your resurrection body at which time you possess the permanent eternal essence that God has paid for.
To have the Holy Spirit seal you up until the day of redemption, means that you are sealed until that actual day arrives in your life. Believing in Christ saves, and the indwelling of the Holy Spirit seals that promise, but the redemption process is not complete until you are resurrected.
The mere fact that God seals you, with a permanent seal, gives you the absolute guarantee of eternal security.
What God seals no one and nothing, can unseal. That includes you. There is nothing you can say, think, or do to undo your redemption or saved status. You can never lose your salvation, otherwise that would imply that God cannot seal with a perfect seal, and that idea is of course ludicrous.
Only arrogance believes that the person is somehow more capable than God, or that God somehow has overlooked something that you yourself have discovered with your superior ability. And only fools maintain this view.
