My husband and I were discussing the fact that since the fall of man from grace, not one soul was allowed into heaven. In all the souls who had passed since then, not one was worthy, other than our Lord to open the gate and allow the souls to enter.

I’m sitting here imagining and pondering our Lord and His passion,on the “Outside”. Not able to fully comprehend the vast amount of souls waiting for Him to come to their rescue.

From the Catechism of the Catholic Church:

ARTICLE 5
“HE DESCENDED INTO HELL. ON THE THIRD DAY HE ROSE AGAIN”

631 Jesus “descended into the lower parts of the earth. He who descended is he who also ascended far above all the heavens.”476 The Apostles’ Creed confesses in the same article Christ’s descent into hell and his Resurrection from the dead on the third day, because in his Passover it was precisely out of the depths of death that he made life spring forth:

Christ, that Morning Star, who came back from the dead, and shed his peaceful light on all mankind, your Son who lives and reigns for ever and ever. Amen.477
Paragraph 1. Christ Descended into Hell

632 The frequent New Testament affirmations that Jesus was “raised from the dead” presuppose that the crucified one sojourned in the realm of the dead prior to his resurrection.478 This was the first meaning given in the apostolic preaching to Christ’s descent into hell: that Jesus, like all men, experienced death and in his soul joined the others in the realm of the dead. But he descended there as Savior, proclaiming the Good News to the spirits imprisoned there.479

633 Scripture calls the abode of the dead, to which the dead Christ went down, “hell” – Sheol in Hebrew or Hades in Greek – because those who are there are deprived of the vision of God.480 Such is the case for all the dead, whether evil or righteous, while they await the Redeemer: which does not mean that their lot is identical, as Jesus shows through the parable of the poor man Lazarus who was received into “Abraham’s bosom”:481 “It is precisely these holy souls, who awaited their Savior in Abraham’s bosom, whom Christ the Lord delivered when he descended into hell.”482 Jesus did not descend into hell to deliver the damned, nor to destroy the hell of damnation, but to free the just who had gone before him.483

634 “The gospel was preached even to the dead.”484 The descent into hell brings the Gospel message of salvation to complete fulfilment. This is the last phase of Jesus’ messianic mission, a phase which is condensed in time but vast in its real significance: the spread of Christ’s redemptive work to all men of all times and all places, for all who are saved have been made sharers in the redemption.

635 Christ went down into the depths of death so that “the dead will hear the voice of the Son of God, and those who hear will live.”485 Jesus, “the Author of life”, by dying destroyed “him who has the power of death, that is, the devil, and [delivered] all those who through fear of death were subject to lifelong bondage.”486 Henceforth the risen Christ holds “the keys of Death and Hades”, so that “at the name of Jesus every knee should bow, in heaven and on earth and under the earth.”487

Today a great silence reigns on earth, a great silence and a great stillness. A great silence because the King is asleep. The earth trembled and is still because God has fallen asleep in the flesh and he has raised up all who have slept ever since the world began. . . He has gone to search for Adam, our first father, as for a lost sheep. Greatly desiring to visit those who live in darkness and in the shadow of death, he has gone to free from sorrow Adam in his bonds and Eve, captive with him – He who is both their God and the son of Eve. . . “I am your God, who for your sake have become your son. . . I order you, O sleeper, to awake. I did not create you to be a prisoner in hell. Rise from the dead, for I am the life of the dead.”488
IN BRIEF

636 By the expression “He descended into hell”, the Apostles’ Creed confesses that Jesus did really die and through his death for us conquered death and the devil “who has the power of death” (Heb 2:14).

637 In his human soul united to his divine person, the dead Christ went down to the realm of the dead. He opened heaven’s gates for the just who had gone before him.

EDIT TO ADD:

From an ancient homily on Holy Saturday
The Lord descends into hell
Something strange is happening—there is a great silence on earth today, a great silence and stillness. The whole earth keeps silence because the King is asleep. The earth trembled and is still because God has fallen asleep in the flesh and he has raised up all who have slept ever since the world began. God has died in the flesh and hell trembles with fear.
He has gone to search for our first parent, as for a lost sheep. Greatly desiring to visit those who live in darkness and in the shadow of death, he has gone to free from sorrow the captives Adam and Eve, he who is both God and the son of Eve. The Lord approached them bearing the cross, the weapon that had won him the victory. At the sight of him Adam, the first man he had created, struck his breast in terror and cried out to everyone: “My Lord be with you all.” Christ answered him: “And with your spirit.” He took him by the hand and raised him up, saying: “Awake, O sleeper, and rise from the dead, and Christ will give you light.”
I am your God, who for your sake have become your son. Out of love for you and for your descendants I now by my own authority command all who are held in bondage to come forth, all who are in darkness to be enlightened, all who are sleeping to arise. I order you, O sleeper, to awake. I did not create you to be held a prisoner in hell. Rise from the dead, for I am the life of the dead. Rise up, work of my hands, you who were created in my image. Rise, let us leave this place, for you are in me and I am in you; together we form only one person and we cannot be separated.
For your sake I, your God, became your son; I, the Lord, took the form of a slave; I, whose home is above the heavens, descended to the earth and beneath the earth. For your sake, for the sake of man, I became like a man without help, free among the dead. For the sake of you, who left a garden, I was betrayed to the Jews in a garden, and I was crucified in a garden.
See on my face the spittle I received in order to restore to you the life I once breathed into you. See there the marks of the blows I received in order to refashion your warped nature in my image. On my back see the marks of the scourging I endured to remove the burden of sin that weighs upon your back. See my hands, nailed firmly to a tree, for you who once wickedly stretched out your hand to a tree.
I slept on the cross and a sword pierced my side for you who slept in paradise and brought forth Eve from your side. My side has healed the pain in yours. My sleep will rouse you from your sleep in hell. The sword that pierced me has sheathed the sword that was turned against you.
Rise, let us leave this place. The enemy led you out of the earthly paradise. I will not restore you to that paradise, but I will enthrone you in heaven. I forbade you the tree that was only a symbol of life, but see, I who am life itself am now one with you. I appointed cherubim to guard you as slaves are guarded, but now I make them worship you as God. The throne formed by cherubim awaits you, its bearers swift and eager. The bridal chamber is adorned, the banquet is ready, the eternal dwelling places are prepared, the treasure houses of all good things lie open. The kingdom of heaven has been prepared for you from all eternity.