Meaning: The same way He sent manna from Heaven to feed the Israelites in the desert for 40 years and fed thousands with just five loaves of bread and two fish, and there were even leftovers.
We often assume that the graces of God come through other people. In both sculptures, the point He is making is that HE DIRECTLY PROVIDES, and when He provides, we need nothing else and what He gives is more than sufficient for everyone.
God’s definition of provision goes beyond our restricted notion of what provision is (fulfillment of temporal wants and needs).