God has not revealed, nor has the Church ever taught in what manner or to what extent the souls in Purgatory suffer, but it is the opinion of the holy Fathers and Doctors of the Church that, what St.. Paul writes to thee Corinthians, (1,iii 15) "But he himself shall be saved: yet so as by fire," must be taken in the literal sense, which is also accepted by St. Thomas Aquinas.
Prayer: O Lord, by Thine infinite love and clemency, graciously grant to the suffering souls in Purgatory remittance of their punishment. Receive them into Thy eternal glory, that blessed by Thy beatific vision, they may praise and adore Thee for ever and ever. Amen.
Special Intercession: Pray for the souls of those who have suffered for the longest time in Purgatory.
Eternal rest grant unto them O Lord, and let perpetual light shine upon them; may they rest in peace. Amen. (Three times)
Practice: Do not let human respect prevent you from performing a duty.
Invocation:My Jesus, mercy!