IV. And by proper use of it we shall win God's favour
And this assuredly it is possible for all to obtain, God helping and guiding us, if by the purification of fasting and by merciful liberality, we take pains to be set free from the filth of sins, and to be rich in the fruits of love. For whatever is spent in feeding the poor, in healing the sick, in ransoming prisoners, or in any other deeds of piety, is not lessened but increased, nor will that ever be lost in the sight of God which the loving-kindness of the faithful has expended, seeing that whatever a man gives in relief, he lays up for his own reward. For “blessed are the merciful, since God shall have mercy on them;” nor wilt shortcomings be remembered, where the presence of true religion has been attested. On Wednesday and Friday, therefore, let us fast, and on Saturday let us keep vigil in the presence of the most blessed Apostle, Peter, by whose prayers we surely trust to be set free both from spiritual foes and bodily enemies; through our Lord Jesus Christ, who with the Father and the Holy Ghost, lives and reigns for ever and ever. Amen.
Source: Sermons (New Advent)