What does 'This is my body' mean in the Lord's Supper?

'This is my body,' which Jesus says during the Last Supper, signifies that the bread represents His physical body, which was sacrificed for the redemption of His people. This teaching underscores the importance of the Supper as symbolic, rather than literal, aligning with the Reformed understanding that the elements are reminders pointing to the spiritual reality of Christ's sacrifice. In Hebrews 10:5, it states, 'A body hast thou prepared me,' pointing to the significance of Christ's incarnation and His purpose to bear the sins of humanity through His physical suffering.