The grace of God given [in the Eucharist] confirms to us the pardon of our sins by enabling us to leave them. As our bodies are strengthened by bread and wine, so are our souls by these tokens of the body and blood of Christ. This is the food of our souls: this gives strength to perform our duty, and leads us on to perfection. If therefore we have any regard for the plain command of Christ, if we desire the pardon of our sins, if we wish for strength to believe, to love and obey God, then we should neglect no opportunity of receiving the Lord’s Supper. Then we must never turn our backs on the feast which our Lord has prepared for us. We must neglect no occasion which the good providence of God affords us for this purpose. This is the true rule – so often are we to receive as God gives us opportunity.
(Sermon 101, “The Duty of Constant Communion”)