John 6:32

He blew their minds right there. Because they credited Moses with that. Moses gave us bread in the wilderness. Jesus says He did not. Do you not understand? There was a God behind Moses. Moses was just the vehicle. He says,

He is telling them, look back in your history and consider this. Moses was an instrument and the bread came. I am an instrument. Now I gave you bread. Who was the One that gave it both times? The Father, and we could say the Son as well because He was the One in the cloud, He was the One in the fire, He was the One that was leading them through the wilderness. But they did not know about the Father. They thought it was just the God of the Old Testament. But Jesus was expanding their minds here and saying, look, it is the great God of the universe that supplied your fathers in the wilderness, and it is the same God which He calls the Father that was supplying them now. And what is more, the bread in the wilderness was physical manna. The bread that He gives now is a Person, the true bread from heaven.

John 6:32-36

They did not have what it took because they were still thinking that it was the physical food that interested them the most. They were not in the right frame of mind for this, not yet, not the hoi polloi that was following Him, the great multitudes. His disciples on the other hand, were of a different mind. At least the Twelve were, as we saw earlier. Many of the ones who were following Him around, supposedly His disciples, left Him after He said what He said.