The Cambridge dictionary defines wisdom as using knowledge and experience to make good decisions and judgments. (1) The most similar equivalent for this word in Arabic is the word  “حکمة” (“Hikmah”) which denotes justice, knowledge and tolerance. (2) 

This word has been used so many times in the holy Quran and has a special meaning in  Islamic literature. The holy Quran says:
Allah grants wisdom to whomever He wishes, and he, who is given wisdom, is certainly given an abundant good, and none takes admonition except those who possess intellect. (2:269) 
About this verse of the Quran, Imam Sadiq (AS) says:
(In this verse) Allah The Almighty has portrayed the intellectuals in the best way. (3)

Hikmah is the message of the Prophets

Allah The Almighty has rapidly pointed out this fact that He has sent the prophets with “Hikmah” and they should teach people how to be wise. The holy Quran says:

Allah certainly favored the faithful when He raised up among them an apostle from among themselves to recite to them His signs (the verses of Quran) and to purify them and teach them the Book and wisdom, and earlier they had indeed been in manifest error. (3:164)
And:
There have already come to them, reports (via the Prophets) containing admonishment, [and representing] far-reaching wisdom; but warnings are of no avail! (4:54)
Also: 
Invite to the way of your Lord with wisdom and good advice and dispute with them in a manner which is the best manner.. (16:125)
And: 
When Jesus brought those manifest proofs, he said, ‘I have certainly brought you wisdom, and [I have come] to make clear to you some of the things that you differ about, so be wary of Allah and obey me. (43:63)

Allah almighty even says that the holy Quran is a book full of wisdom:
These are among [precepts] that your Lord has revealed to you of wisdom. (17:39)
These are the signs of the wise Book (31:2)

What is wisdom in the eyes of Allah?

The original meaning of the word “Hikmah” is wisdom, knowledge and tolerance and the ability to use your knowledge in the best way; but Allah The Almighty prefers some special kinds of wisdom. The verses of the Quran and the hadiths, try to clarify the true meaning of wisdom from Islamic sight.

Obedience towards Allah 

•    Abu-Basir, one of the brilliant pupils of Imam Sadiq (AS) once asked him about the verse; “He grants wisdom to whomever He wishes (2:269)”. Imam Sadiq (AS) replied, “That (Wisdom) is obeying Allah and knowledge about Islam” (4)
•    Imam Baqir (AS) also says that “Hikmah” means: “not to commit the sins that Allah has ordained for it the Hell as a punishment” (5)
•    Once Prophet Muhammad (PBUH & HP) asked a group of people who they are.
They said that they are some faithful people.
The Prophet (PBUH & HP) asked: “What are the signs of your faith?”
They said: “We are content about what Allah has planned for us and we are submissive to the order of our God and we trust in him for everything.”
The Prophet said: “You are so knowledgeable and wise the way that your wisdom can almost make you like prophets.” (6)

Knowing our Imams

Imam Sadiq (AS) about the verse “…and he, who is given wisdom, is certainly given an abundant good (2:269)” said ,“The abundant good is knowing Imam Ali (AS) and the other Imams (AS)” (7) 
He also said: “(The “Hikmah” mentioned in the verse is) obeying Allah and knowing the Imam (of your time)”
In Arabic, the word “جهل” (Jahl) means “Ignorance”, which can be considered the opposite of “Hikmah”. So anyone who is not “Hakim” (wise) is “Ignorant” in Islamic culture. There is a hadith narrated from the Prophet (PBUH & HP) in which he said:

Anyone who dies while they don’t have an Imam will have died like a person in the ages of ignorance (8)

This hadith has been narrated by all Muslims’ Sunnis and Shiites and the authenticity of this record is undeniable. 
About knowing the Imam, Imam Sadiq (AS) also said:
Anyone from among the followers of Prophet Muhammad (PBUH & HP) who understands the status and the rights of their Imam, will find how delightful  having faith is.(9)

Understanding Religion

The last meaning of “Hikmah” mentioned in the Hadiths is “Fiqh” (jurisprudence) which means “Understanding”. In Islamic culture, this word is  employed  to define a deep understanding of religion and profound knowledge about  it . (10)
Imam Sadiq (AS) said: 

“Hikmah is the knowledge about religion and understanding it (Fiqh). Therefore, anyone who understands the teachings of the religion is a “Hakim” (a wise person). Indeed above all, Satan wishes the ones who deeply understand religion, to be dead.” (11)
The Holy Prophet (PBUH & HP) said: 
Allah has given me the Quran and he also gave me Hikmah just like the Quran and every house which therein is no Hikmah is nothing but a ruined place. So learn Fiqh and get to know the religion so that you don’t die like ignorant people. (12)

To wrap up, in the Islamic view, “wisdom” means knowing how to live as a good servant of Allah and living the same way. As you see, all the meanings mentioned in the Quran and the Hadiths are about knowledge of religion and living the way religion indicates. Knowing your Imam (who is the leader Allah has chosen for you) is the best way to understand what you should do and how you should obey the orders of Allah.  It is then obvious that all these different meanings and teachings employ a common concept which is obeying the order of Allah after having enough knowledge about it.  
It is then obvious that all these different meanings and teachings employ a common concept; obeying the orders of Allah after gaining and enjoying competent knowledge about them.

Resources

1.  https://dictionary.cambridge.org/dictionary/english/wisdom 
2. Al-Ain, Khalil ibn Ahmad al-Farahidi, vol.3, pg.66
3. Al-Kafi, Sheikh Koleini, vol.1, pg.13
4. Tafsir noor ath-Thiqhlain, al-Huvaizi, vol.1, pg.287
5. Tafsir, Al-Ayyashi, vol.1, pg.151
6. At-Tohid, Sheikh Saduq, pg.371
7. Tafsir noor ath-Thiqhlain, al-Huvaizi, vol.1, pg.287
8.  Musnad Ahmad ibn Hanbal, vol.28, pg.88
9.  Basa’ir ad-Darajat, Muhammad ibn Hassan as-Saffar, pg.412
10.  Sihah, al-Johari, vol.6, pg.2243
11.  Tafsir, al-Ayyashi, vol.1, pg.151
12.  Majma al-Bayan, Sheikh at-Tabarsi, vol.2, pg.194
     

Prophet Muhammad (PBUH & HP) has been sent as a perfect role model for human beings, both in deeds and behavior. This is emphasized in the Quran (33:21) and the sayings of Infallible Imams (AS): “Certainly, in the Prophet of Allah (PBUH and HP) was sufficient example for you and a proof concerning the vices of the world, its defects, the multitude of its disgraces and its evils” [1]. Being mercy to all humans, Prophet Muhammad’s (PBUH & HP) compassion included not only Muslims but every human being. This fact is evident in his manner towards opposers and how he dealt with the followers of other religions that we reviewed some of them in the first part of the topic and the rest will be introduced here.

Preaching the World Powers of that Era

As mentioned in the Quran, Islam is a religion for the people all around the world: “We did not send you except as a bearer of good news and warner to all mankind” (34:28). Hence, it was a duty over the Prophet Muhammad (PBUH & HP) to promote Islam in other parts of the world, too. As soon as his message had been spread in the region of Hejaz, and the Islamic government had been established after the settlement of conflicts among parties in dispute, Prophet (PBUH & HP) received the divine order to universalize his mission (9:33-48:28). Accordingly, he sent several messages to the governors of various countries. In these messages, he neither threatened to war nor obliged them to obey him. Instead, he used kind words to invite them to monotheism (Tawhid). About 185 messages are reported that had been sent to the leaders of countries, heads of tribes, and emperors, which all shared a peaceful approach [2]. 

All the messages he sent to Al-Muqawqis, the ruler of Egypt, Heraclius, the Emperor of the Byzantine Empire, and Al-Najashi, the king of the Kingdom of Aksum, started with salutations and greetings. Then, they were asked to let their people hear the divine message that Prophet (PBUH & HP) had and decide freely whether they want to follow it or not. The reason behind sending letters to the heads of countries and tribes was that, if the leader of a group were convinced to change his\her mind and accepted Islam, then he\she would let his\her people hear the message of Islam and invite them more easily to Islam; like what happened with Al-Najashi. Hearing the Surat Maryam and realizing the truth, he let those Muslims who had moved from Mecca to Aksum to save their lives and settle down safely in his realm. This permission caused Islam to be spread readily in that land, and many people accepted Islam willingly.  

 This matches the principles of “peaceful coexistence” and “religious coexistence” that are encouraged in Islam [3]: “Say, ‘O People of the Book! Come to a common word between us and you: that we will worship no one but Allah, that we will not ascribe any partner to Him, and that some of us will not take some others as lords besides Allah.” (3:64).

Prophet Muhammad (PBUH & HP)'s  Attitude towards Non-Muslims

Prophet Muhammad (PBUH & HP) always encouraged Muslims to justice, fairness, respecting the rights, and avoiding harassment in dealing with the followers of other religions [2]. He said: “Whoever oppresses who is in agreement with Muslims and imposes a burden on him more than his tolerance, I will be against him on the judgment day.” [4] and “whoever offends who is under the protection of Islam, has offended me.” [4]. Those who were under the protection of Islam were the Jews and Christians who participated in providing the expenses of the Islamic government in return for being protected by paying money called “Jizya.” This shouldn’t be confused with paying for the right of life, but it means that the Jews and Christians were considered as common citizens who lived in a friendly ambiance with Muslims in the society, and no one was permitted to hurt them.

Moreover, Prophet Muhammad (PBUH & HP) cared about the living conditions of non-Muslims such that he ordered Muslims to give charity to the People of the Book (Jews, Christians, Sabians, and Zoroastrians) who were in need [5]. This was an act of humanity, and not a religious obligation, that originated from Prophet’s (PBUH & HP) exemplary character.

He respected non-Muslims such that once he was among his companions that people brought the corpse of a Jew. Prophet (PBUH & HP) stood up as a sign of respect. The companions told that the dead one was a Jew. He answered that one should stand up to respect the dead body, whether it belongs to a Muslim or a non-Muslim [6].

From what has been discussed above, one can see that Prophet Muhammad (PBUH & HP) has truly represented the peaceful essence of Islam through his words and acts. And actually, many of his enemies and non-Muslims embraced Islam due to his lovely noble character.

References:

1.  “Nahjul Balaqa,” Sermon 160.
2.  A. Ahmadi Miyanji, “Makatib al-Rasul,” p. 261-263.
3.  M. A. Amini, “The principle of peaceful coexistence with non-Muslims in Islam,” Ma’rifat Journal, no. 165, p. 35-52.
4.  S. Balaqi, “Justice and judgment in Islam,” p. 57.
5.  A. A. F. Thibarah, "Ruhuddin al-Islami," p. 276.
6.  Jafar Sobhani, “Introduction to principles of Islam,” p. 528-529,