Mere symbolism is a mistake, clearly. The real physical presence is also a mistake. The biblical doctrine brings us back to the real spiritual presence. I like the Book of Common Prayer on this....the bread and wine are a 'visible sign of the thing signified" kind of deal.
ALMIGHTY and everliving God, we most heartily thank thee that thou dost graciously feed us, in these holy mysteries, with the spiritual food of the most precious Body and Blood of thy Son our Saviour Jesus Christ; assuring us thereby of thy favour and goodness towards us; and that we are living members of his mystical body, which is the blessed company of all faithful people; and are also heirs through hope of thy everlasting kingdom.
And here we offer and present unto thee, O Lord, ourselves, our souls and bodies, to be a reasonable, holy, and living sacrifice unto thee. And although we are unworthy, yet we beseech thee to accept this our bounden duty and service, not weighing our merits, but pardoning our offences; through Jesus Christ our Lord, to whom, with thee and the Holy Ghost, be all honour and glory, world without end. Amen.
I have Beza's work on the Supper and will comment in this thread after reading it.
Yours in the Lord,
jm