God's Desire for Our Salvation is Infinite
Confession: manifestation of God's mercy
"The soul also receives Baptism in another way, speaking in figurative terms, by special providence of my divine love. I was well aware of human fragility and weakness, that leads human beings to offend me. Persons are not constrained by this nor by any other thing to commit the fault, if they do not wish, but being weak they commit mortal sins, thus losing the grace they received in holy baptism by virtue of the Blood. For this reason it was necessary that Divine Love should make available a continual baptism of the Blood. This baptism comes about through a contrite heart and through confession of sins to a priest, when possible, for they have the keys of the Blood, the Blood the priest pours upon the soul when he absolves the person. If some one is unable to confess, contrition of heart is sufficient. Then my mercy bestows on you the fruit of this precious Blood, but if you can confess I want you to do so, and whoever being able does not confess, will remain deprived of the benefit of the Blood. However, it is true that whoever, at the moment of death wants to confess and is unable to do it, he likewise shall receive the fruit of the Blood. But let nobody be so foolish at life's end, hoping to set his soul in order, because it is not certain that I, due to his obstinacy, may say in consonance with my divine justice: "You did not remember me during your life, when you had time. I do not remember you now at the point of death!"
Let no one procrastinate it, but even if there should be somebody who has wilfully done so, he ought not omit baptizing himself with hope in the Blood even if it were the last day. You see then how this baptism is continual and the soul must be baptized in it until life's end, as I have indicated. Through this baptism you can understand that the torment of the cross ended, but the fruit of this torment, which you received from me is infinite. This is due to my infinite divine nature, united to finite human nature. This human nature suffered in me, Word, clothed with your humanity. Since one nature is joined and kneaded with the other, the eternal divinity brought upon itself the torment which I bore with such ardent love.
That is why this my action can be said to be infinite, not because the torment suffered bodily is infinite, nor the torment of my desire of accomplishing your redemption, which really finished and came to an end on the cross when the soul was separated from the body. But the fruit that sprang from that torment and the desire for your salvation are infinite. That is the reason why you can unsparingly receive this fruit. If it had not been infinite then humanity would not have been redeemed: people of the past, the present and the future. It would not have been possible for persons who sin to be purified from their sins, if this baptism of blood had not been offered without measure, because the fruit of the Blood is infinite.
I showed you this in my open side, where you discover the secret of my heart: namely, that I love you much more than what I could show you with the finite torment. I have shown you that my love is infinite. In what way? With the baptism of the Blood, joined to the fire of my charity, that out of love was poured out; and through baptism, understood in the common sense, given to Christians, to whoever wishes to receive it, baptism of water joined to blood and to fire, in which the soul is kneaded with my blood. To show you all this I wanted blood and water to flow forth from my side. Now I have answered your request."
St. Catherine of Siena, Doctor of the Church: The Dialogue LXXV