I am reading a book by Adam Gazzaley titled The Distracted Mind. Brain researchers have shown that human brains, when searching for and finding information, light up in the same way that animal brains light up as they graze for and find food. 

So in a sense, our brains are eating as we gather information. 

Upon reading this I immediately was reminded of the creation story. Remember in the creation story God told Adam & Eve to eat from the tree of life, which contained his own life and to not eat from the tree of knowledge (see Gen 2:16-17). 

In a very real sense God in the beginning linked eating to himself (the tree of life) and to knowledge (knowledge of good and evil). Just like what is referenced in the Gazzaley book.
New and interesting information feed us in a mental and even a spiritual way.  Brain scientists are just beginning to see what God alluded to in Genesis.

I also think this is why social media can be so addicting. Social media is a constant flow of new and customized information. In a sense we are eating as we scan our social news feeds.
Jesus understood this when he told people to seek him first and to eat his flesh and drink his blood and for his disciples to feed his people and one another. 

“For My flesh is true food, and My blood is true drink. He who eats My flesh and drinks My blood abides in Me, and I in him. As the living Father sent Me, and I live because of the Father, so he who eats Me, he also will live because of Me.”‭‭ – John‬ ‭6:55-57‬

Paul understood this when he taught his churches to look to Jesus, and as he constantly re-focused their attention on the knowledge of Jesus Christ.

It’s almost as if God responded to our choice of knowledge of good and evil by sending Jesus Christ, and now we both eat of knowledge, (specifically knowledge of Jesus Christ) who happens also to be the tree of life itself.

In Jesus Christ, eternal life and knowledge are summed up unified in one person.

“Grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord; seeing that His divine power has granted to us everything pertaining to life and godliness, through the true knowledge of Him who called us by His own glory and excellence.” – 2 Peter‬ ‭1:2-3‬ ‭NASB‬‬

We are to constantly center our lives on feasting on the knowledge of Jesus Christ, and feeding others. In this way we are well nourished and do feast on the tree of life, the real eating and drinking, just as God intended.