Ramadan is the ninth month of the Islamic calendar, observed by Muslims worldwide as a month of fasting, prayer, reflection and community. In this holy month Muslims fast from the food, drink, smoking, and sexual activity, and other specific activities drawn by Islam between dawn to nightfall until when the evening adhan is sounded in order to practice abstaining. There is definitely a higher purpose beyond not eating or drinking behind fasting. Fasting is one of the Principles of Islam, a religious duty commanded by Allah. Muslims who obey such commands or duties are said to receive thawab* each time for each good deed and receive redemption in the afterlife. Today we are going to discuss the real philosophy behind this Principles but at first, let us see some of the Quran verses pointing to fasting and its place in Islam. 

Almighty Allah says: 

O you who have believed, decreed upon you is fasting as it was decreed upon those before you that you may become righteous – 
(The Holy Quran 2:183) 

Also:

The month of Ramadhan [is that] in which was revealed the Qur'an, a guidance for the people and clear proofs of guidance and criterion
(The Holy Quran 2:185)

The high purpose of Fasting

This principle is often emphasized in the principles of Islamic jurisprudence “The basis for the formation of all religious and divine rules is the interests and corruptions that philosophy is its cause”. 

The second surah of The Quran (Al-Baqarah) clearly telling us the purpose of the act of fasting, talks about Divine bowing (verse 185), thanksgiving (verse 185), Benefiting from divine help (verses 45 and 153), benefiting from Allah (verse 184), attaining piety (Verse 183) and victory and success in deeds (verses 45 and 153) are among the wisdom and goals of fasting. We will discuss them deeply now:

1. The test of sincerity

Fasting has other benefits and effects, the most important one is identifying the sincere; Because fasting means abstaining from drinking and eating and sexual pleasures as well as other prohibitions, it is very difficult for many people who cannot wash their hearts of material pleasures and are only humble and submissive who give up by divine command. Therefore, it can be said that fasting is one of the most important divine tests through which sincerity can be recognized. Imam Ali (AS) says about this function of fasting: Allah made fasting obligatory in order to test the sincerity of the people. (1) Also, Lady Fatemeh (AS) says about the role of fasting insincerity: Allah has made fasting obligatory in order to establish sincerity. (2)

2. Fasting and empathy with others

Other functions of fasting include the element of empathy; Because the fasting person understands the difficult conditions of others by fasting, and because of the suffering he suffers during the fast, he feels the suffering of the poor deeply now. Creating similar conditions and assimilating the living space with the lives of the poor, in the most important dimension, namely the lack of food and drink and other pleasures, causes a feeling of sympathy and provides the ground for financial benevolence and charity. Some rich people, for various reasons, including illness or intentionally not fasting, have to pay atonement, so one of the purposes of fasting is to reach a part of the wealth and property of the rich to the poor so that at least the life of the poor is provided and the level of class distance becomes slightly lower.

we can also refer to this wisdom that Imam Sadigh (AS) has stated about the obligation of fasting: Allah has made fasting obligatory so that the rich and the poor become equal (3) Imam Reza (AS) also says about this matter: People are commanded to fast in order to understand the pain of hunger and thirst, and through it to find the poverty and misery of the Hereafter. (4)

3. Fasting, the Zakat (charity) of body

Another wisdom mentioned in the narrations for fasting is zakat of the body. In the sense that zakat is for everything; That is, just as it is zakat for property, which by paying for it provides the ground for proper growth and development of the body. Prophet Mohammad (PBUH&HP) said: Zakat is for everything and zakat on the bodies is fasting. (5) Also, our dear Prophet (PBUH&HP) said: Fast to stay healthy (6)

Medical research has proven today that fasting has a very effective role in eliminating diseases, especially cancer; this is because the lack of nutrients in the body has the first effect on cancer cells and dries out their roots. Therefore, in order to have a healthy body and all the organs of the body to work properly, we must accept fasting as a treatment and use it for the proper development of our body.

4. Fasting is a kind of Jihad

In the teachings of Islam, Jihad, especially its military one, has been set as a standard for other tasks due to its difficulty to achieve. Therefore, matters such as gaining halal, marrying well, and the like are considered and measured as jihad. Fasting is a difficult and arduous task because it is even permissible to step on carnal pleasures. Fighting against carnal desires and confronting erotic issues is one of the most important jihads known as the Great Jihad; and it is more difficult to fast in the heat of summer and under the sun and with work and labor. Such a fast is one of the best examples of deeds from the ideals of Prophet (PBUH&HP) that he said: Fasting in the heat is jihad. (7)

Imam Sadegh (AS) also says about fasting in extreme heat: Whoever fasts for Allah on a very hot day and becomes thirsty, Allah will appoint a thousand angels to touch his face and give him the good news until he breaks his fast. (8)

The best fast

Achieving true fasting means that not just a person's body and tongue fasting, but also his heart and mind are fasting. Imam Ali (AS) says in expressing the best types of fasts: The fast of the heart is better than the fast of the tongue, and the fast of the tongue is better than the fast of the belly (9). So, in the real fast, all the organs of a person must be fasting from sin and mistakes. It is also narrated from Lady Fatima (PBUH) that: What is the use of fasting for a fasting person who has not preserved his tongue, ears, eyes, and joints? ** (10) 

Conclusion

There is no point in Islam that hasn’t been checked by wisdom higher than human ones. If there are acts in Islam that are hard or pointless in our sight, that means we can’t see their higher purpose. Islam is always fresh and never gets old like other religions and it seeks human redemption so follow its orders to find yourself in the righteous path 

References:

1. Nahj al-Balagha (verse 252)
2. Bihar al-Anwar (96th volume – page 368)
3. Man La Yahduruhu al-Faqih (second volume – page 43)
4. Wasa'il al-Shia (4th volume – page 4)
5. Al-Kafi (4th volume – page 62)
6. Bihar al-Anwar (96th volume – page 255)
7. Bihar al-Anwar (96th volume – page 257)
8. Al-Kafi (4th volume – page 64)
9. Exalted Aphorisms and Pearls of Speech (first volume – page 417)
10. Bihar al-Anwar (93th volume – page 295)

* Thawab means punishment and has been used in both good and evil deeds of the human, and of course it is often used in good deeds.
**Lady Fatima (AS) has made a Denial interrogation in this narration of hers that it makes it more understandable

Full body ablution (Ghusl) refers to an Islamic ritual in which an adult (Mukallaf) Muslim is recommended to wash his/her full-body with specific rulings. 

In this article, we will explain different types of full-body ablution (Ghusl) and their rulings.

Different types of full body ablution (Ghusl)

Muslim jurists have driven the rules of full-body ablution (Ghusl) based on different verses of the Quran and different narrations and traditions. The main verse of the Quran that is referred to in deriving the rules of full-body ablution (Ghusl) is the following: 

“O you who have faith! Do not approach prayer when you are intoxicated, [not] until you know what you are saying, nor [enter mosques] in the state of ritual impurity until you have washed yourselves, except while passing through. But if you are sick or on a journey, or any of you has come from the toilet, or you have touched women, and you cannot find water, then make your full-body ablution on clean ground and wipe a part of your faces and your hands. Indeed Allah is all-excusing, all-forgiving.” (4:43)

Based on the above verse, Muslim jurists have provided the following rules for full-body ablution (Ghusl):

The obligation of full body ablution (Ghusl)

Different types of full-body ablution (Ghusl) can be categorized as follows: 

1-    The obligatory full body ablution (Ghusl) common between men and women:

a)    The full-body ablution (Ghusl) for ritual impurity (Janabah)
b)    The full-body ablution (Ghusl) for touching a corpse (Mass al-Mayyit)
c)     The full-body ablution (Ghusl) given to a corpse (Mayyit) 
d)     The full-body ablution (Ghusl) that becomes obligatory on the account of a vow (Nazr), oath (Qassam), etc.

2-    The obligatory full body ablution (Ghusl) for women: 

a)     The full-body ablution (Ghusl) for menstruation (Haydh)
b)      The full-body ablution (Ghusl) for lochia (Nifas)
c)      The full-body ablution (Ghusl) for irregular blood discharge (Istihadhah) [1]

3-    Recommended full body ablution (Ghusl)

There are some specific times that Muslims are recommended to perform full-body ablution (Ghusl), for example, the Friday Full-body ablution (Ghusl-e Jum’ah), or the full-body ablution (Ghusl) that are recommended to perform on specific Islamic occasions such as the nights of decree. (Laylatul Qadr). [2]

How to perform full body ablution (Ghusl)?

There are two methods to perform full-body ablution (Ghusl) that will be described in this part. The first thing to do before starting the full-body ablution (Ghusl) is to make an intention for it. However, it is not necessary to perform a separate full-body ablution (Ghusl) for different intentions. 
If there are several recommended (Mustahab) or obligatory full-body ablutions (Ghusl) to be performed and one performs one full-body ablution (Ghusl) with the intention of performing all of them, it is sufficient. However, if one of them is full-body ablution (Ghusl) of ritual impurity (Janabah) and the intention is made to perform it, it suffices for all other full-body ablutions (Ghusl), although caution is to make the intention for all of them. [3]

The methods of full body ablution (Ghusl)

1-    Sequential full-body ablution (Ghusl-e Tartibi)

In sequential full-body ablution (Ghusl), one must – based on obligatory precaution – first, with the intention of full-body ablution (Ghusl), wash the entire head and neck and then the entire body. It is better to first wash the right side of the body, then the left. If one intentionally or due to being negligent in learning the laws of full-body ablution (Ghusl)does not wash the entire head and neck before washing the body, then based on obligatory precaution his full-body ablution (Ghusl)is invalid. Furthermore, based on obligatory precaution, when performing full-body ablution (Ghusl), it is not sufficient to make the intention of full-body ablution (Ghusl) when moving the head, neck, or body while they are already under the flow of water; rather, the part that one wants to perform full-body ablution (Ghusl)on – on the condition that it is already under the flow of water – must be taken out from under the flow of water and then washed with the intention of full-body ablution (Ghusl). [4] 

2-    Immersive full-body ablution (Ghusl-e Irtimasi) can be performed in two ways:

a)    Instantaneous (Daf’i): 

In this type of full-body ablution (Ghusl) water must cover the entire body in one go. However, it is not necessary for the entire body to be out of the water before starting the full-body ablution (Ghusl): rather it will suffice if part of the body is out of the water and the person goes under the water completely with the intention of performing full-body ablution (Ghusl). An example of instantaneous immersive full-body ablution (Ghusl)is when a person, with the int¬ention of performing full-body ablution (Ghusl), dives/jumps into a swimming pool and in doing so completely immerses himself in the water; or, the person may already be partly immersed in the water and he then completely immerses himself with the intention of full-body ablution (Ghusl). [5]

b)    Gradual (Tadriji)

In gradual immersive full-body ablution (Ghusl), one must gradually – but in a way that can be commonly considered to be one unified action – immerse his body in water with the intention of full-body ablution (Ghusl). In this type of full-body ablution (Ghusl), it is necessary for each part of the body to be out of the water before it is washed. An example of gradual immersive full-body ablution (Ghusl) is when a person, with the intention of performing full-body ablution (Ghusl), immerses part of his body in a bath tub of water and then takes that part out of the water; then, he immerses another part of his body and takes it out, and so on until all the parts of his body have been immersed. [6]

Water requirements for full body ablution (Ghusl)

The water that is permissible for full-body ablution (Ghusl) can be Rainwater, Well water, water from spring, sea, or river water, water of melting snow or hail, water of a big tank or pond. Ghusl is not allowed with unclean or impure water or water extracted from fruit and trees. [7] 

References: 

1. Obligatory (wājib) ritual bathing (ghusl) » Introduction
2. Ghusl
3. Rules of Ghusl
4. Obligatory baths (Ghusl) » Sequential ritual bathing (al-ghusl al-tartībī)
5. Obligatory baths (Ghusl) » Immersive ritual bathing (al-ghusl al-irtimāsī)
6. obligatory baths
7. Imam Khomeini, Risalah Tozih al-Masa’el, p. 39-40