his having given up his food, drink, and desire for the sake of the One he worships—that is a matter (1) no human being can know. This is the true essence of fasting.
Fasting has a remarkable effect in preserving the outward bodily faculties and the inner powers, protecting them from indiscriminate eating that introduces corrupt substances which impair them when they take hold, and expelling harmful substances that prevent them (2) from enjoying good health. Fasting thus preserves the health of the heart (3) and the bodily faculties, restoring what desires have robbed them of. It is therefore among the greatest aids to being mindful of Allah, as Allah Most High says:
“O you who believe, fasting has been prescribed for you as it was prescribed for those before you, so that you may become mindful of Allah.” [Al-Baqarah: 183]
The Prophet, peace and blessings be upon him, said: “Fasting is a shield” (4).
He instructed those whose desire for marriage was intense, but who lacked the means to marry, to fast, making fasting a means of curbing this desire (5).
The point is that, since the benefits of fasting are evident to sound minds and upright natural dispositions, Allah prescribed it for His servants out of mercy for them (6), kindness towards them, and as a protective regimen