One of the many instances of wisdom in fasting in Ramadan from the point of view of improving the conduct of the instinctual soul and giving up its rebellious habits is as follows:
The human soul forgets itself through heedlessness. It cannot see the utter powerlessness, want, and deficiency within itself and it does not wish to see them. And it does not think of just how weak it is, and how subject to transience and to disasters, nor of the fact that it consists merely of flesh and bones, which quickly decline and are dispersed.
Simply, it assaults the world as though it possessed a body made of steel and imagined itself to be undying and eternal. It hurls itself onto the world with intense greed and voracity and passionate attachment and love. It is captivated by anything that gives its pleasure or that benefits it. Moreover, it forgets its Creator Who sustains it with perfect compassion, and it does not think of the results of its life and its life in the hereafter. Indeed, it wallows in dissipation and misconduct.
However, fasting in the month of Ramadan awakens even the most heedless and obstinate to their weakness, impotence, and want. By means of hunger, they think of their stomachs; they understand the need therein. They realize how unsound are their weak bodies, and perceive how needy they are for kindness and compassion. So they abandon the soul's pharaoh-like despotism, and through recognizing their utter impotence and want, perceive a desire to take refuge at the Divine Court. And they prepare themselves to knock at the door of mercy with the hands of thankfulness. So long as heedlessness has not destroyed their hearts, that is.
Bediuzzaman Said Nursi / Risale-i Nur Collection / The Letters