St. Thomas Aquinas, the Angelic Doctor, affirms that the succor and suffrage given to the departed are more acceptable to God than that which is bestowed upon the living, because the former are more in need and unable to obtain help for themselves.
The Venerable Ludovico Blosio, a great master of the spiritual life, says: Our good and merciful Lord loves the souls of his elect, who must be purified after death, and desires their release so ardently, that whenever in Christian charity we set free by out suffrages any soul from Purgatory, we do a thing as acceptable to God as if we had delivered the Lord Himself from a hard captivity. And He promises to give us as full a recompense as such a work of mercy practised toward Himself would deserve; for He Himself has said: " Amen, I say to you: as long as you did it to one of these, My least brethren, you did it to me." (Matth.xxv. 40)
The same is affirmed by St. Ambrose: "Whatever we do for the suffering souls with a pious intention, will revert to our own merit, and shall be returned a hundredfold, in the hour of death."
Prayer: O God of love and mercy, animated with charity and compassion for our departed brothers and sisters, we offer Thee our prayers and good works, and supplicate Thee to accept them as a propitiatory sacrifice in their behalf. Through Christ, Our Lord, Amen.
Special Intercession: Pray for the souls of those who were negligent in offering good works for the suffering souls.
Lord grant them eternal rest and let perpetual light shine upon them. May they rest in peace. Amen. (Three times.)
Practice: Bear your sufferings with patience, and offer them for the holy souls.
Invocation: My Jesus, mercy!