Council of Trent: Session XIV, Extreme Unction, Chapter II

CHAPTER II. On the Effect of this Sacrament.

Moreover the thing signified and the effect of this sacrament are explained in those words; And the prayer of faith shall save the sick man, and the Lord shall raise him up, and if he be in sins they shall be forgiven him. For the thing here signified is the grace of the Holy Ghost; whose anointing cleanses away sins, if there be any still to be expiated, as also the remains of sins; and raises up and strengthens the soul of the sick person, by exciting in him a great confidence in the divine mercy; whereby the sick being supported, bears more easily the inconveniences and pains of his sickness; and more readily resists the temptations of the devil who lies in wait for his heel; and at times obtains bodily health, when expedient for the welfare of the soul.

Translation: J. Waterworth, The Canons and Decrees of the Council of Trent (1848), Hanover Historical Texts Project transcription (1995).