The souls in Purgatory are no longer in a state to acquire merit. How these souls look on the charity exercised for them in the world.
If the souls in Purgatory could purge themselves by contrition, they would pay all their debt in one instant such blazing vehemence would their contrition have in the clear light shed for them on the grievousness of being hindered from reaching their end and the love of God.
Know surely that not the least farthing of payment is remitted to those souls, for thus has it been determined by God's justice. So much for what God does as for what the souls do, they can no longer choose for themselves, nor can they see or will, save as God wills, for thus has it been determined for them.
And if any alms be done them by those who are in the world to lessen the time of their pain, they cannot turn with affection to contemplate the deed, saving as it is weighed in the most just scales of the divine will. They leave all in God's hands who pays Himself as His infinite goodness pleases. If they could turn to contemplate the alms except as it is within the divine will, there would be self in what they did and they would lose sight of God's will, which would make a Hell for them. Therefore they await immovably all that God gives them, whether pleasure and happiness or pain, and never more can they turn their eyes back to themselves.