Purgatory by Fr. Frederick William Faber, D.D. was first published in 1928. The teachings of the Church have not changed. With the infinite mercy of God, purgatory provides a state where we can atone for the temporal punishment of sin and be purified to enter heaven, unblemished and perfected.
The souls in purgatory cannot pray for themselves. They need our prayers. Pray for your loved ones and also those who have no one to pray for them. Some of the most abandoned souls are priests and religious who people tend to think do not need prayers.
Souls you have helped release from purgatory will be eternally grateful for your prayers.