"I see that the souls in purgatory behold a double operation. The first is that of the mercy of God; for while they suffer their torments willingly, they perceive that God has been very good to them, considering what they have deserved and how great are their offences in his eyes. For if his goodness did not temper justice with mercy (satisfying it with the precious blood of Jesus Christ), one sin alone would deserve a thousand hells. They suffer their pains so willingly that they would not lighten them in the least, knowing how justly they have been deserved. They resist the will of God no more than if they had already entered upon eternal life.
"The other operation is that satisfaction they experience in beholding how loving and merciful have been the divine decrees in all that regards them. In one instant God impresses these two things upon their minds, and as they are in grace they comprehend them as they are, yet each according to her capacity. They experience thence a great and never-failing satisfaction which constantly increases as they approach to God. They see all things, not in themselves nor by themselves, but as they are in God, on whom they are more intent than on their sufferings. For the least vision they can have of God overbalances all woes and all joys that can be conceived. Yet their joy in God does by no means abate their pain."
