Westminster Larger Catechism #170
Q. How do they that worthily communicate in the Lord’s Supper feed upon the body and blood of Christ therein?
A. As the body and blood of Christ are not corporally or carnally present in, with, or under the bread and wine in the Lord’s Supper,1 and yet are spiritually present to the faith of the receiver, no less truly and really than the elements themselves are to their outward senses;2 so they that worthily communicate in the sacrament of the Lord’s Supper, do therein feed upon the body and blood of Christ, not after a corporal and carnal, but in a spiritual manner; yet truly and really,3 while by faith they receive and apply unto themselves Christ crucified, and all the benefits of his death.4