From what I have read a few minutes in Purgatory can seem like years.
That is part of why we must practice real penance in this life, and seek indulgences.
Rev. F.X. Schouppe’s book ‘
Purgatory’ contains some speculation on how long one might be in Purgatory:
'Father Mumford, of the Company of Jesus, in his “Treatise on Charity towards the Departed,” bases the long duration of Purgatory on a calculation of probability, which we shall give in substance. He goes out on the principle that, according to the words of the Holy Ghost, The just man falls seven times a day, that is to say, that even those who apply themselves most perfectly to the service of God, notwithstanding their good-will, commit a great number of faults in the infinitely pure eyes of God. We have but to enter into our own conscience, and there analyse before God our thoughts, our words, and works, to be convinced of this sad effect of human misery. Oh! how easy it is to lack respect in prayer, to prefer our ease to the accomplishment of duty, to sin by vanity, by impatience, by sensuality, by uncharitable thoughts and words, by want of conformity to the will of God! The day is long; is it very difficult for even a virtuous person to commit, I do not say seven, but twenty or thirty of this kind of faults and imperfections?
Let us take a moderate estimate, and suppose that you commit about ten faults a day; at the end of 365 days you will have a sum of 3650 faults. Let us diminish, and, to facilitate the calculation, place it at 3000 per year. At the end of ten years this will amount to 30,000, and at the end of twenty years to 60,000. Suppose that of these 60,000 faults you have expiated one half by penance and good works, there will still remain 30,000 to be atoned for.
Let us continue our hypothesis: You die after these twenty years of virtuous life, and appear before God with a debt of 30,000 faults, which you must discharge in Purgatory. How much time will you need to accomplish this expiation? Suppose, on an average, each fault requires one hour of Purgatory. This measure is very moderate, if we judge by the revelations of the saints; but at any rate this will give you a Purgatory of 30,000 hours. Now, do you know how many years these 30,000 hours represent? Three years, three months, and fifteen days. Thus a good Christian who watches over himself, who applies himself to penance and good works, finds himself liable to three years, three months, and fifteen days of Purgatory.
The preceding calculation is based on an estimate which is lenient in the extreme. Now, if you extend the duration of the pain, and, instead of an hour, you take a day for the expiation of a fault, if, instead of having nothing but venial sins, you bring before God a debt resulting from mortal sins, more or less numerous, which you formerly committed, if you assign, on the average, as St. Frances of Rome says, seven years for the expiation of one mortal sin, remitted as to the guilt, who does not see that we arrive at an appalling duration, and that the expiation may easily be prolonged for many years, and even for centuries?’
Several years ago I read a newspaper article on the apparitions of Our Lady at Fatima.
