Some people leave a will naming those people who will receive the inheritance after their death. Of course, everyone wants to be named in that will but not all will be. In the same way, in heavenly matters there are things similar to earthly ones, for example, in this case God has appointed us in His testament leaving us an inheritance, and we give glory to God for this.
There is a passage in the Bible that tells us about this:
4 But when the set time had fully come, God sent his Son, born of a woman, born under the law,
5 to redeem those under the law, that we might receive adoption to sonship.
6 Because you are his sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.”
7 So you are no longer a slave, but God’s child; and since you are his child, God has made you also an heir.
Galatians 4: 4-7
God has made us His children, and this through the death of His Son on the cross, with His blood He has given us life, He has raised us up, giving us an eternal inheritance, an eternal and incomparable gift and this should make us feel the more privileged heirs, since our inheritance is not corrupted but is eternal.
All of our heavenly inheritance begins with Christ and ends with Christ. All that the Father has granted us in His immense sovereignty comes from the sacrifice of the Son of God on the cross, that precious blood shed was the feather with which God wrote our name in that testament.
We are no longer slaves, we are no longer condemned, we are no longer people who can not go before the throne of grace, no! The way is totally open for us, and it is because God through His Son on the cross, through that shed blood, gave us life and made us sit in the heavenly places.
How privileged we must feel in this moment, that we, being undeserving of His grace and forgiveness, have been included in this glorious testament with a heritage of eternal life. We have been chosen to give us an inheritance!