And for my next trick... !

Calvin says:

When I baptise, is it as if I had the Holy Ghost up my sleeve to produce at any time? or the body and blood of the Lord to offer to whom I please? It would be sheer presumption to seek to attribute to mortal creatures what belongs to Jesus Christ.

Sermon on Acts 1:4-5, CR 48:600 quoted in Wallace, Word and Sacrament etc. p172