[ctdonath2]

Doesn’t this happen all the time? should be common given it’s transubstantiation.

[agere_contra]

I think that God only makes His body and blood visible in this startling way when He wishes to make His presence extremely clear to someone. For instance, I guess He might do it when someone is in danger of committing a grave sacrilege.

But most of the time we have the God-given grace to live in holy fear and respect of the Eucharist. When we know what the sacrament is, perhaps there's no need for a visible miracle to go with the unseen one.

After all: blessed are those who have not seen and yet believe.