God can bless us

"First, let it be done unto the Lord, with our eye singly fixed on Him. Let our intention herein be this, and this alone, to glorify our Father which is in heaven; to express our sorrow and shame for our manifold transgressions of His holy law; to wait for an increase of purifying grace, drawing our affections to things above; to add seriousness and earnestness to our prayers; to avert the wrath of God; and to obtain all the great and precious promises which He hath made to us in Jesus Christ....Let us beware of fancying we merit anything of God by our fasting. We cannot be too often warned of this; in as much as a desire to 'establish our own righteousness', to procure salvation of debt and not of grace, is so deeply rooted in all our hearts. Fasting is only a way which God hath ordained, wherein we wait for His unmerited mercy; and wherein, without any desert of ours, He hath promised freely to give us His blessing.

- John Wesley, 1703-1791