It is the terrestrial verse celestial.. flesh verse spirit mentality.
The Lord is often teaching this.. The bread of life for the Hebrew was manna bread in the Old Testament ..
The Lord teaches us His word is our bread of life.. We believe.. we Have Faith.. that the Lord’s New Testament Saves us from our sins.
John 6
31 Our fathers did eat manna in the desert; as it is written, He gave them bread from heaven to eat.
32 Then Jesus said unto them, Verily, verily, I say unto you, Moses gave you not that bread from heaven; but my Father giveth you the true bread from heaven.
33 For the bread of God is he which cometh down from heaven, and giveth life unto the world.
34 Then said they unto him, Lord, evermore give us this bread.
35 And Jesus said unto them, I am the bread of life: he that cometh to me shall never hunger; and he that believeth on me shall never thirst.
36 But I said unto you, That ye also have seen me, and believe not.
37 All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
John 4:23
But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seeketh such to worship him.
Back to the I am….. Father and Son are One.. When the Lord spoke they did not recognise GOD. Those of us that Believe know the Father and Son.