In what respect is Christ present and discernible in the sacrament?

Asks Revd Prof James Durham, of the Supper. He answers:

Not simply considered as He is the Son of God, nor in respect of any benefit from Him as Mediator, neither simply as Redeemer; but He is held out as incarnate; and so this sacrament differs from the Jew's Passover, which held Him out as to come, while this holds Him out as having come... as suffering, as having his body broken... in respect of the end for which he suffered... as communicable, and in capacity to be participated of by us... [in reference to the Covenant].

The Unsearchable Riches of Christ (1764, reprinted 2002, Soli Deo Gloria) quoted in Maclean, Lord's Supper, p95