"Bread strengthens man's heart," and "wine makes it glad" (Ps. civ. 15). To strengthen the _heart_ is to produce confidence. Now, it may be asserted that confidence and joy, being incorporeal entities, are the same in essence under whatever external conditions they are generated. They are the same whether experienced in consequence of taking {33} bread and wine, or in consequence of understanding and accepting the covenant of life made sure by the body and blood of Christ. Although physical science is wholly incapable of informing us _how_ the _corporeal_ elements bread and wine produce in those who partake of them _feelings_ of strength and gladness (the antecedents and consequents not being in the same category), we can yet understand that the Creator of all things might by His immediate will attach to those substances such effects, not alone for the sake of man's body, but for the higher purpose of thereby informing his spirit that there is cause for confidence and joy in the broken body of the Lord, and his poured-out blood. This view is justified by the language of St. Paul, where he says, speaking of the Son of God, that "all things were created through him and _unto_ him" (_eis auton_, Col. i. 16); from which doctrine it may be inferred that our Lord, having regard to the cognizable effects of bread and wine spoken of by the Psalmist, said of bread, "This is my body," and of wine, "This is my blood," because his body and blood, when "spiritually discerned," have _the very same effects_.