How do we know that the gospel is the true food for our souls?

In the sermon, the preacher emphasizes that the gospel is the bread from heaven, essential for spiritual life. Jesus states in John 6:51, 'I am the living bread which came down from heaven; if anyone eats of this bread, he will live forever.' This highlights how the gospel satisfies the deepest spiritual hunger that all humans possess. In contrast, those who are spiritually lazy will seek solace in false gospels, which do not provide true spiritual nourishment, demonstrating a need for believers to actively engage with the true gospel to sustain their souls.