Empty Stomach = Better Thinker

If your--if you keep your stomach empty, the blood is at your brain, and you must be ready. And if you're all full when you're... That's the power of fasting. When you're--when you're full, the blood goes into your stomach to digest your food. You see? And then when you're empty, it's in your--in your brain. So you can be just... 'Cause them two spirits is so close it could deceive the very elect, if possible.

The Resurrection of Lazarus 50-0813A

According to recently published research from Yale University, an empty stomach can make you smarter. Their advice to students - don't eat so much before your next test.