What happens when you eat bread and wine?
According to Calvin in Ronald Wallace’s Calvin’s Doctrine of the Word and Spirit, at the Supper God is:
“taking up into his activity an earthly action or event and uniting with himself for a moment, a human element.”
In other words, God spiritually takes residence in something earthly and imparts his life to feed us. We often hear that God loves us, but this teaches us that God actually likes us, and is willing to use created stuff to communicate himself to us.