And whilst they were at supper, Jesus took bread, and blessed, and broke: and gave to his disciples, and said:
Take ye and eat. This is my body.
And taking the chalice, he gave thanks, and gave to them, saying: Drink ye all of this.
From the Gospel of Matthew 26: 26-28.
This is my body: This is what is called transubstantiation.
for many: For not everyone follows His way.