Whatever we look at or even see, enters our mind and soul, and sticks to them. Imam Ali (AS) said: “The eye is the reporter of heart and the messenger of mind.” [1]. It means that every act of looking profoundly affects our heart and soul. The prophet (PBUH&HP) said: “Avoid unnecessary excess looks as they grow lust in your hearts and make you heedless.” [2].

In another saying from Imam Ali (AS), we read that: “The eyes are the snares of Satan” [3]. That is why Islam has special guidelines and rules about at what or whom, one is allowed or not to look. And, this is more pressing in case of Muslims living in a non-Muslim society, where they are constantly exposed to both men and women freely and improperly dressed in the streets, TV, magazines, web pages, etc. Islam has regulated looking at the opposite gender according to the two categories: Mahrams and non-Mahrams [4].

Men Looking at Mahram Women 

A man is permitted to look at the body of a woman who is his Mahram, except her private parts (Awrah). And he must not look at her body from the navel down to the knee. This means that a woman should dress decently even in the presence of her Mahrams. One’s wife is an exception to this rule; married couples are allowed to look at the entire body of each other.

Men Looking at non-Mahram Women

It is forbidden for a man to look at the body of any non-Mahram woman but he can look at her hands and face as long as they do not have any decoration. If the woman is Muslim, then he is not allowed to look at her hair. But if she is not Muslim, looking at her hair is not forbidden as long as it is not for pleasure.

Generally, there is no sin on a man for the first involuntary look at any non-Mahram woman, but the second look should be avoided [5]. In any case, men should remember that: “Tell the faithful men to cast down their looks and to guard their private parts. That is more decent for them.” (24:30).

This rule also extends to adolescent boys and even younger ones, who understand women’s physical attributes and might be attracted to them. They should be taught to lower their gaze, too. Since children’s minds and souls are clear lands ready to be cultivated with several types of thoughts and ideas mostly captured by eyes, we need to teach them which seeds they should plant in their lands to attain Allah’s eternal satisfaction.

Men Looking at Other Men and Women Looking at Other Women

A man is not allowed to look at another man’s private parts, nor a woman at those of another woman; whether Muslim or not. Besides, looking at any parts of the body of another man, even the face and arms, will be forbidden for a man if done with the intention of having pleasure. The same ruling applies to a woman towards another woman. This also means that one should always cover his/her private parts in the presence of others, even of the same gender.

Women Looking at Mahram Men

A woman is allowed to look at the body of a man who is her Mahram, except his private parts, if it is not for having pleasure. One’s husband is an exception to this rule as mentioned earlier. 

Women Looking at non-Mahram Men

A woman is not permitted to look at the body of a non-Mahram man, except for the face, hands, and that amount which men usually [i] do not cover and if it is not for pleasure.

Looking at a Small Child's Private Parts

One is permitted to look at the entire body of a child until he/she reaches the age when the child’s consciousness of sex has developed, or when evidence of sexual urge is noticed on him/her; even if it is before reaching puberty. However, it is better to accustom the child to always dress properly.

As a general rule, it is forbidden (Haram) to look at anyone (even at one’s own body) or anything (including people’s photos and films, statues, etc.) with the intention of having pleasure (with the exception of one’s spouse), even if one is looking at a Mahram.

In cases of “necessity” such as in administering first aid, medical treatment [ii] or during a trial testimony where the judge requests the witness to look at a non-Mahram to identify him/her [6], all the rules of the prohibition of looking become void. As an instance, if a doctor is compelled to look at a part of the body of a non-Mahram woman, he must only look at that part necessary for the treatment, but not more than that. Also, if possible, the examination or testing must be performed over the clothing. Other exceptions are looking at one’s spouse as explained above.

Notes:

[i] This, although following a definite limit indicated in Islamic ruling that should be respected, is based on the normal condition of each society to some extent.

[ii] In the case that a doctor of the same skill and with the same gender is not available.

References:

1. M. B. Majlesi, “Bihar al-Anwar”, vol. 104, p. 41, T. 52.
2. M. B. Majlesi, “Bihar al-Anwar”, vol. 72, p. 199.
3. M. B. Majlesi, “Bihar al-Anwar”, vol. 77, p. 294.
4. www.al-islam.org
5. Ibn Babawayh, “Man la yahduruhu al-Faqih”, vol.3, p.474, T. 4658.
6. looking to others

“O believers, when the proclamation is made for prayer on the Day of Congregation (Friday), hasten to God's remembrance and leave trafficking aside. That is better for you did you but know.” (62:9)  
What do you think as you see a crowd of people gathered in one place, in regular rows? Acting altogether, simultaneously and in a well-organized manner? And they are dressed beautifully and smell good? Especially when they are hundreds and thousands? I see this as a glorious union. You can find this kind of forgathering in a Friday prayer. 

Congregations in Islam

Islam emphasizes three congregations: Haj which is held annually in a large scale, weekly Friday prayers and daily congregational prayers. Hajj is God’s plan to bring huge amounts of people together in Mecca, to show the power of Islam and unite the Muslims; besides its specific spirituality. Imam Baghir (AS), the fifth Imam, mentions Hajj as one of the five bases on which Islam is founded. [1]
Friday prayer is of such high importance and value that when a person said to Prophet Muhammad (PBUH&HP) that he has got ready several times to go to Hajj but has not managed to, our prophet (PBUH) told him to attend Friday prayer which is Hajj of the poor. [2]

These show that Friday prayer has many characteristics of Hajj and can be influential in the same way, on a smaller scale though.

Friday

In several narrations from the last prophet (PBUH&HP) and his household, Friday is known as the best night and day of the week. It is recommended to perform full ablution (qusl), wear your best clothes, cut nails, brush your hair and beard, trim mustaches and wear perfume on this day. One of the main reasons for these recommendations is getting ready to show up among Muslims in Friday prayer.

Friday prayer (Salat al-Jumu’ah)

Friday prayer (Salat al-Jumu’ah) is an Islamic ritual. It begins with two khutbahs (orations) by Imam al-Jumu’ah in which he advises people toward observing virtue. In the first one, he elaborates on religious concepts. In the second one, he discusses political and social matters of Muslims’ community. 

Then Friday prayer is performed in congregation. It consists of two rak’ahs (parts). Each rak’ah has a qunut (raising hands); in the first rak’ah before ruku’ (bowing), in the second one after ruku’. Friday prayer and the two orations before that are a substitution to the four-rak’ah Salat al-Zuhr. After that, a four-rak’ah Salat al-Asr is performed. Please note that:

- Friday prayer cannot be performed individually.    

- Except for the Imam, there should be at least four people for a Friday prayer to be held. [3]

Friday prayer; obligatory or recommended?

Prophet Muhammad (PBUH&HP) says: “Surely God-may be blessed and exalted- made Friday prayer obligatory for you. If someone abandons it in my life or after my death, aiming to belittle or deny it, God will distress them and won’t bless them in their work; and know! their prayer is not accepted, and know! their alms-tax (Zakat) is not accepted; and know! their Haj is not accepted; and know! their good deed is not accepted until they repent.” [4]

In an ordinary situation, i.e. the presence of innocent Imam, Friday prayer is a determinate duty. That is the same duty should be done and it cannot be replaced by another one. But now that the twelfth and last Imam, Mahdi (AS) is absent, Friday prayer is a selective duty. Which means you can choose between performing Friday prayer or Salat al-Zuhr. [5]

Yet, considering its profits, Muslims should pay special attention to Friday prayer. 

Why Is Friday Prayer Highly Recommended? 

Imam Reza (AS), the eighth Imam, states the importance of Friday Prayer and its Khutbahs comprehensively: “Because Friday is a public rendezvous, khutbah on Friday has been arranged to be a means for governor to advise people and to encourage them to obedience and to warn them of disobedience and to inform them of God’s will about their interest of religion and world and let them know of what has happened to them in the world and of events in which they have disadvantage or advantage.”[6]

Reason of Repetition

- We are forgetful beings. We need to be advised repeatedly so that we may not neglect the afterlife, miss the path, and forget necessities of the society.

- See these daily and weekly prayers as the stages of a ladder. By each prayer, we should take a step upwards. By praying, we are communicating with God and by practicing in a regular program, we can enhance the quality of this communication.

References:

1. Al-Kafi, v.2, p.18
2. Wassail al-Shi'a, v.7, p.300
3. Khamenei.ir
4. Wassail al-Shi'a, v.7, p.302 
5. Khamenei.ir 
6. Wassail al-Shi'a, v.7, p.344