we hunger for what we feed on.this is true in both the physical and the spiritual.
if you feed on junk physically that is what you will hunger for. for example, if eat fast food and other junk this is what you will crave and then suffer the consequences of. if you feed on fruit and vegetables and other healthy foods this is what you will seek when hungry.
when taking a spiritual perspective, we either feed on the things of the world, or the things of God. we either hunger for Gods word and His presence, or for worldly things such as possessions, what we see on television, gossip and those sorts of things.
you choose what you fill up on and then how healthy you will be.