Medieval philosophers and theologians sought simply to label
this simple biblical faith: Jesus said that bread is his body and
wine is his blood even though it did not appear to change into
visible flesh and blood.
part of the bread and wine elements
changes; bread becomes Jesus' body and wine becomes
parts--sight, taste, smell, touch of
bread and wine--do not.
Catholics believe that since Jesus said it and He is God,
he can do it. They believe! "Transubstantiation" merely labels it.
In everyday life, it is not at all uncommon to believe in things
people cannot perceive by the senses: wind, electricity, love,
peace, etc. All the more when Jesus says it.