John 6:35
ESV - 35 Jesus said to them, "I am the bread of life; whoever comes to me shall not hunger, and whoever believes in me shall never thirst.
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What is ingested as the staple of one's life is what is referred to. Jesus represents the word of GOD, perfectly received and responded to. Apart from Jesus a toxic mixture of harmful things are ingested (spiritually) and the resulting life is corrupted.