"Uno no puede pensar bien querer bien dormir bien si no ha cenado bien"

Simplified Meaning:

When you don’t eat a good meal, it affects everything you do. Imagine trying to concentrate on your work or studies when you are hungry; it's really hard to focus. Similarly, when your stomach is empty, showing kindness or affection to others becomes tough because all you can think about is your hunger. Even falling asleep is challenging when you are not well-fed because your body is uncomfortable. Eating a healthy and satisfying meal gives you the energy and peace you need to function well in your daily life. For example, before an important test or a big day, having a nutritious breakfast helps you perform better because you can think clearly and stay calm. So, making sure you eat well is key to doing well in many parts of life.