For this reason slanderers and those who wickedly judge and despise others cannot but receive death in the sacrament, as St. Paul writes [1 Cor. 11:29]. For they do not unto their neighbor what they seek from Christ and what the sacrament indicates; they wish them no good, have no sympathy with them, do not receive them as they desire to be received by Christ, and then all into such blindness that they do not know what else to do in this sacrament except to fear and honor Christ in the sacrament with their prayers and devotion. When they have done this they think they have done their whole duty, although Christ has given His body for this purpose, that the significance of the sacrament, that is, fellowship and mutual love, may be put into practice, and His own natural body be less regarded than His spiritual body,[23] which is the fellowship of His saints. What concerns Him most, especially in this sacrament, is that faith in the fellowship with Him and with His saints may be rightly exercised and become strong in us, and that we, in accordance with it, may rightly exercise our fellowship with one another. This purpose of Christ they do not perceive and, in their devoutness, they daily say and hear mass, and remain every day the same; nay, become worse daily, and mark it not.
Therefore take heed; it is more needful that you discern the spiritual than that you discern the natural body of Christ, and faith in the spiritual is more needful than faith in the natural. For the natural without the spiritual profiteth us nothing in this sacrament; a change[24] must occur and manifest itself through love.