"Although most modern dogs are kept as pets, there are still a tremendous number of ways in which dogs can and do assist humans, and more uses are found for them every year" [1]. This animal is used in many activities such as rescuing, herding, sledding, hunting, guarding, tracking, and Human Remains Detection.There are also war and police dogs, which all indicate the versatility of this animal. But in Islam, there are some restrictions regarding the relationship with this useful creature.The term "impure" (Najis) in Islamic jurisprudence refers to things that are avoided because of the intensity of filth in them, one of which is dogs. The religion of Islam has warned Muslims to keep dogs “as pets” since they are deemed dirty. Now, let’s see why:

The Impurity of Dogs

Unless properly trained, dogs will defecate and urinate where ever they please; they also slobber everywhere, which doctors say is the cause of many diseases and infections.

Even though the level of awareness about the hazards of having a dog has increased among dog owners and necessary precautions about keeping it as a pet have been taken by them, dog bites continue to be a public health problem in the USA [1].

Doctors always warn about diseases we may catch from dogs: “Hookworms and roundworms (Ancylostoma and Ascaris) are common nematodes of dogs. When a human accidentally eats something contaminated with worm eggs from a pet’s stool, the eggs hatch in the intestines and begin migrating throughout that person’s body” [2].

From the viewpoint of Islam, when we speak about the impurity of the dog, we mean its "outward" filth and all its organs including skin, flesh, and hair. So, everything is considered as "impure" in contact with a wet dog or vice versa (a wet thing in contact with a dog). Almost all Muslim scholars do not doubt that dogs are impure animals. There are many narrations (Hadiths) about the impurity of dogs in authentic narration books, including:

“Allah has not created a creature more impure than dogs” [3].
“If your clothes get dampened by a dog, then you must wash them” [4].

The Fidelity of Dogs

Perhaps, one of the reasons for Islam to prohibit Muslims from keeping dogs as pets [3] is due to the high fidelity of these animals. The bond between dogs and their owners has an important impact on family relationships in a way that the dog owner may forget his family members and relatives, adore his/her pet, and neglect God’s worship as well.

It has been reported that “More and more US women are forgoing motherhood and getting their maternal kicks by owning handbag-size canines” [5].

Trained dogs in Islam

There are possibly two reasons for a person to have a dog: affection for the animal or security.

In the first case, the dog will most probably live with you in your house, which is prohibited according to Islamic law.

And in the second one, the case of security, the dog is mostly kept on the periphery of your house or property; like the dogs that are held for hunting, guarding livestock, crops, and for guarding houses, etc. These dogs are called trained dogs (Kalb-e-Moallam) in Islam and the rules regarding them are different from the ones for the other kinds of dogs.

There are exceptions to them, and they are not considered “impure” because of their skills. This fact has been mentioned in the Holy Quran directly: “As for what you have taught hunting dogs [to catch], teaching them out of what Allah has taught you, eat of what they catch for you and mention Allah’s Name over it …” (5:4)

Do Muslims hate dogs?

But do Muslims consider dogs as filthy and useless creatures? No. because these animals are also creatures of God. Similarly, despite its many benefits and its importance for human life, human blood is also regarded as impure in Islamic teachings.

In other words, dogs’ impurity does not deny the existence of their good features such as loyalty or innocence, just as the impurity of human urine, feces, and blood has nothing to do with his/her humanity.

On the other hand, Islam has proposed very detailed rights for all kinds of animals including dogs, which a Muslim must respect and observe. For example, one day when Imam Hussain (AS) saw his servant sharing his food with Imam’s garden guard dog, he highly admired the servant for his kind behavior, rewarded him with 1000 Dinars and even donated the garden to him just for observing the right of a dog [6].

Is that all?

The words mentioned above reveal the Islamic view of dogs. But is that all? Have we successfully and thoroughly looked into it to reach firm ideas about dogs?

To tell you the truth, we are not always able to understand the essence of Islamic rules and guidelines. More importantly, Muslims have learned to fully observe the practices ordained by God because they believe these practices are best for them, just like following the instructions that come with the electronic devices without questioning them.

If God, the Prophet (PBUH&HP), and infallible Imams (AS) prohibit specific practices, it is definitely because they have certain harmful effects on us that may or may not be immediate or measurable.

“…while He has already elaborated for you whatever He has forbidden you, excepting what you may be compelled to [eat in an emergency]? Indeed many mislead [others] by their fancies, without any knowledge. Indeed your Lord knows best the transgressors.” (6:119)

In a nutshell

It is permissible to keep dogs for security purposes in Islam, but you cannot let them inside your house. However, this does not mean we can harm dogs or hate them, Not at all; on the contrary, we should always be compassionate with dogs as much as we should be with any other living kind.

References:

1. Nicolae Sfetcu, About Dogs.
2. keep pets
3. All Creatures Health Care
4. Vasael Alshia, vol. 1, p. 220 Hadith 560, Imam Sadiq (AS)
5. Vasael Alshia, vol. 1, p. 225 Hadith 571, Imam Sadiq (AS)
6. al about pets
7. Mustadrak Alvasayel, vol. 7, p. 192

The Holy Quran is said to be "the highest miracle of Islam". But why would a book turn out to be the proof of Prophet Muhammad’s (PBUH) prophethood? What does it reveal about Islam's attitude toward the issue of learning or seeking knowledge?  How does a true Muslim seek knowledge?

There are many verses in the Quran about acquiring knowledge. The very first verse of the Quran that was sent to our Prophet starts with an imperative form of the verb "read" (Ighra) [1]. Literacy and having knowledge is so important in Islam that Quran equals illiteracy to being in darkness [i]. Accordingly, it is the duty of any Muslim to try to learn. Besides, many Islamic scholars advise Muslims to strive for achieving knowledge. One of them is a quotation (hadith) from Prophet Muhammad (PBUH&HP): “Seek knowledge, even if it is in China”. Considering the distance between the Arabian Peninsula (where the Prophet lived) and China as well as the lack of transportation 14 centuries ago, one can imagine how arduous it was to travel there. In addition to many life-threatening dangers, it is no exaggeration to say that it took several months to arrive there. This shows the emphasis on the importance of learning.

When the prophetic mission of Prophet Muhammad (PBUH&HP) started, most people in his land were illiterate, so, he asked the literate ones to teach Muslims; even prisoners of war were granted freedom provided that they taught literacy to at least ten Muslims. It has been said that once, the Prophet (PBUH&HP) entered a mosque and saw two groups of people; one group was praying and the other was sharing knowledge. He stated that both of them were doing a good job, and then continued his speech by saying that he was sent to people by God “to teach” them. So he went and sat in the second group [2]. When Prophet Muhammad (PBUH&HP) was alive, there were places like schools where both women and men had the freedom to take part in classes. And, different fields of knowledge were learned including religion, literature, poetry, rhetoric, medicine, astronomy, etc [3].

A human being is curious by nature. We have been created with an inquiring mind. It has been said that all human beings are bestowed a gift, that is the brain as well as the desire for learning. The desire to learn is in our nature [4]. In Islamic instructions, there is a huge emphasis on the value of seeking knowledge. It has been quoted from Prophet Muhammad (PBUH&HP): “Seek knowledge from the cradle to the grave”. It is a must for every Muslim regardless of their age, race, or gender [5]. All people must have the ability and liberty to learn, teach, exchange, and share information. It does not matter from whom you are learning. As long as they have the knowledge, it would be perfect. There is an Islamic hadith from the fifth Imam of Muslims, Imam Muhammed Al-Bagher (AS), quoted from Jesus Christ (AS) saying that: “Learn knowledge from someone who has it and does not look at their deeds.” There is no kind of prejudice whatsoever in choosing the teacher. The only important thing is the learning itself. Besides, ignorance has been known as the root of many miseries; and knowledge is like a vast amount of treasure that never runs out.

Notes:
[i]. (13:16)

References:

1. Ahamiyate Danesh-Andoozi az Nazare Eslam Akhlagh va Irfan 
2. Morteza Motahari, "Talim va Tarbiyat Dar Eslam [Education in Islam]", Sadra, p. 22, 2008.
3. Soheyla Jalali, Derakhsheshe Zanane Mosalman Dar Arseye Elm va Farhang Dar Sadre Eslam Pajooheshgahe Oloom va Farhange Islami
4. Morteza Motahari, "Moghadame'I bar Jahanbiniye Eslami. [An Introduction to Islamic Ideology]", Sadra, p. 274, 2004.
5. Faeze Azimzade Ardebili, Hghe Amoozeshe Zanan Dar Eslam va Gharb [The Right of Learning for Women from Islamic and Western Viewpoint