Suffering does not result in forgiveness because without the shedding of blood, there is no forgiveness of sin.
The shedding of blood is the ONLY means by which forgiveness is granted.
So at the very least, purgatory is useless, meaningless suffering.
I am pretty sure that David suffered: 2 Samuel 12:13 And David said unto Nathan, I have sinned against the LORD. And Nathan said unto David, The LORD also hath put away thy sin; thou shalt not die.
2 Samuel 12:14 Howbeit, because by this deed thou hast given great occasion to the enemies of the LORD to blaspheme, the child also that is born unto thee shall surely die.
2 Samuel 12:15 And Nathan departed unto his house. And the LORD struck the child that Uriah's wife bare unto David, and it was very sick.
2 Samuel 12:16 David therefore besought God for the child; and David fasted, and went in, and lay all night upon the earth.
2 Samuel 12:17 And the elders of his house arose, and went to him, to raise him up from the earth: but he would not, neither did he eat bread with them.
2 Samuel 12:18 And it came to pass on the seventh day, that the child died. And the servants of David feared to tell him that the child was dead: for they said, Behold, while the child was yet alive, we spake unto him, and he would not hearken unto our voice: how will he then vex himself, if we tell him that the child is dead?
Please keep talking!
It did not earn him forgiveness of sin.
Hebrews 9:22 Indeed, under the law almost everything is purified with blood, and without the shedding of blood there is no forgiveness of sins.
I am pretty sure that David suffered: 2 Samuel 12:13 And David said unto Nathan, I have sinned against the LORD. And Nathan said unto David, The LORD also hath put away thy sin; thou shalt not die.
So why does the priest prescribe “ten ‘Our Fathers’ and ten ‘Hail Marys’” instead of thirty lashes? After all, you believe we need to “suffer” for forgiveness.
You really should learn the concepts of “grace” and “mercy.”
Heb 9:27-28 And as it is appointed unto men once to die, but after this the judgment: (28) So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation.