You have to make God your sole concern. You have to make God the centre of your thoughts. You have to keep thinking and reflecting on God. But often we get distracted. This distraction causes us great loss. The purpose of Ramadan is to train yourself to avoid distractions. The moment you face distractions, your mind will turn to other things.

For example, people make elaborate preparations for sehri and iftar. This is also distraction. When you give importance to tasty food, prepare delicious food for sehri and iftar, this will become your distraction. A poet has said:

تن پروری خلق فزوں شد زریاضت

جز گرمیِ افطار نہ دارد رمضاں ہیچ

The purpose of Ramadan was for people to concentrate on God, but people began to run after delicious food.

The purpose of fasting was to concentrate, turn away from other things and remember  God. You are required to think and read the Quran.

But tasty food creates a distraction and turns your attention away from God. This kills the spirit of fasting. It is very important to lead a simple life during Ramadan and to eat simple food.  Those who are not content with simple food will have their fast wasted. An integral part of fasting is to lead a simple life. It is not possible to live with the spirit of fasting if you eat delicious meals. The real purpose is to reduce your desire to eat lavish food.  You must eat enough to keep yourself healthy. This is why, simple food is a part of fasting. Without simple food, the purpose of fasting will not be achieved. A purpose of fasting is that it kills the desire to run after tasty food.