Calvin and the Mystery of the Eucharist

In his Commentary on 1 Corinthians, while commenting on 11.24, Calvin pushes back against all those who would seek to explain the inner workings of the Lord's Supper:

“In the meantime, however, drive away gross imaginations, which would keep thee from looking beyond the bread. […]” These few things will satisfy those that are sound and modest. As for the curious, I would have them look somewhere else for the means of satisfying their appetite.

Though Calvin does briefly discuss his own view of the Supper in this work, clearly he puts a great deal of emphasis on the need not to explain too much.