Ecclesiastes declares the absolute vanity of all things under the sun. Biblical vanity does not refer to an excessive care on good looks. Biblical vanity is emptiness or worthlessness.
Among the many things Christ is compared to in the holy scripture, to set forth his transcendent excellency, beauty, usefulness, and perfections, this of a Fountain is none of the least, it being a most profitable metaphor.
What kind of meat are you working for? The multitude followed Jesus across the Sea of Galilee when they saw that He could feed them. They wanted to know what they needed to do in order to keep getting bread. What is your bread? Or meat? Is it to know God and to do His will?
