Deuteronomy 8:3 He humbled you, causing you to hunger and then feeding you with manna, which neither you nor your ancestors had known, to teach you that man does not live by bread alone but on every word that comes from the mouth of the Lord.
Psalm 81:10 I am the Lord your God, who brought you out of Egypt. Open wide your mouth and I will fill it.
Proverbs 19:22 What a person desires is unfailing love; better to be poor than a liar.
Isaiah 55:2 Why spend your money on what is not bread, and your labor on what does not satisfy? Listen, listen to me, and eat what is good, and you will delight in the richest of fare.
1 Peter 2:2 Like newborn babies, crave pure spiritual milk, so that by it you may grow up in your salvation…
So if you happen to know me personally (or not even that personally), one thing you will quickly find out about me is that I like to eat. It doesn’t take much for me to get hungry and usually I will do everything I can to satiate that hunger, at any cost. I will travel to the ends of the earth to indulge my appetite. Settling for just any old thing will not do. If I’m craving chicken tikka masala and garlic naan from my favorite Indian restaurant down the street from where I live, getting chicken tikka masala and garlic naan from another place across town will not cut it. I will eat it, but I will definitely not be satisfied. As a matter of fact, I’ll be a little angry that I wasted my precious hunger on something 
that didn’t even fulfill the longing that only my favorite restaurant could satisfy. So many times, we have cravings and desires–whether it be for food, attention, particular human interactions, certain forms of entertainment, etc.–that we seek to gratify. We feel anxious and unfulfilled if we go without attending to those desires. The longer we go without attending to those desires, the more our desires will wane. Just as our physical being has needs and desires that seek to be met, so does our spiritual being. If any of those needs are neglected, the desire will lessen.
On Binge Solutions, it says: “Cravings build up to a peak and then subside if not gratified–although it does not feel as if they will ever disappear. The more cravings are not satisfied the weaker the cravings become. However resisting cravings is not easy, particularly in the beginning.” This really makes me think of my relationship with God. We all have a spiritual need that can only be satisfied by our Creator. Being a disciple, I feel a little more aware than I used to be when I haven’t come to Him like I should for my spiritual nourishment. I need to be filled by Him; my soul pains when I haven’t had any quality time with Christ. When we resist that need to come to Him initially–it’s difficult. Whether it be our sin or any other issue we’re struggling with, we have to actively choose to not have that spiritual craving satisfied. And the longer we ignore that call, that call to come back to Christ to be fed, the weaker our desire for Him gets and the harder our hearts become.
When we seek to have that God-designated spot in our hearts filled by some other substitute, it will do nothing but leave us feeling empty and unfulfilled. Just as when I have a craving for chicken tikka masala and garlic naan that only my favorite restaurant can satiate, my spiritual need can only be satisfied by Christ. Nothing else can satisfy that longing in my heart.