Life is a journey full of twists and turns. Without a guide in this deceptive path, one can become lost, forfeiting something that cannot be regained - the precious gift of redemption. That is why Islam emphasizes the need for Muslims to never be without a leader. Prophet Mohammad (PBUH&HP) is the best example of a Muslim within Islam.

There has certainly been for you in the Messenger of Allah an excellent pattern for anyone whose hope is in Allah and the Last Day and [who] remembers Allah often. (The Holy Quran 33:21)

O you who have faith! Obey Allah and His Apostle, and do not turn away from him while you hear [him]. (The Holy Quran 8:20)

These Quranic verses firmly establish that no one surpasses Prophet (PBUH&HP) as the ideal role model, guiding us to emulate his actions and lifestyle for our salvation. When we follow someone as a model in our life, we inherently respect his beliefs and ideas. 

From this, we deduce that if our model is devoted to Islam, religion, and the path of Allah's pleasure, we will also try to align ourselves with that path and potentially attain spiritual ascension. Our model here is not an ordinary person but our dear Prophet. Therefore, there is no disputing the goodwill of this revered figure. An important thing that we must learn from the Prophet (PBUH&HP) as the supreme model for Muslims is to know whom to love and whom to dislike.

The question is: how does understanding Prophet’s feelings towards individuals would help us? 
The answer lies in this: “By following the Prophet as an example, we can accurately discern these people, subsequently progressing toward Allah’s satisfaction and eternal happiness.” 

Two figures whom the Prophet constantly favored were Imam Hassan and Imam Hussein (as). Imam Hussein (AS) was born on the third of Sha'ban in the fourth year of AH.

Since the great Prophet passing in the tenth year of AH, Imam Hassan and Imam Hussein (AS) spent their childhood with their dear grandfather.

Before delving further, let us know more about our third Imam. Imam Hussein (as) is also called Aba-Abdillah and Sayyid al-Shuhada among the Shias. He is the third Imam for the Shias, martyred in the course of Ashura. He is the second child of Imam Ali (AS) and Fatemeh Zahra (AS), and the grandson of Prophet Mohammad (PBUH&HP). Following his brother Imam Hassan’s (AS) leadership, he took charge of leading the Shias for ten years. Both Shia and Sunni historical records confirm that the Prophet of Islam (PBUH&HP) announced his martyrdom at his birth and chose the name "Hussein" for him. (1)

The Prophet held deep affection for Imam Hassan and Imam Hussein and recommended everyone to love them. Imam Hussein (AS) is one of the of Prophet’s Ahl al-Bayt and also one of the recipients of the verse of purification*.

Numerous narrations from Prophet Mohammad (PBUH&HP) extol Imam Hussain’s virtue. A famous narration quotes the Prophet (PBUH&HP) on Imam Hussain (AS): “Hussain is from me and I am from Hussain. Allah loves who loves Hussain.” (2)

Through this narration, the Holy Prophet (PBUH&HP) show other Muslims the sacred position of Imam Hussein (PBUH) and imparts the exceptional stature of this lineage. In an era where falsehood and hypocrisy infiltrate the Muslim community, this saying compels believers to rid themselves of hypocrisy and misguidance. 

Regrettably, despite its resonance, this profound message did not deter the brutal martyrdom of Sayyid al-Shuhada (PBUH), which transpired in the Karbala before thousands of seemingly Muslim individuals.

The Prophet’s (PBUH&HP) adoration for Imam Hussein (AS) served a dual purpose: it conveyed not only his love for his grandson, but also aimed to engender affection towards Imam Hussein as the Imam of the Ummah, rallying people to follow him. Therefore, the Holy Prophet of Islam consistently introduced the Imam Ali, Fatima Zahra, Imam Hassan and Imam Hussein (AS) as his family and Ahl al-Bayt. He equated them with the Quran on numerous occasions,  underscoring the necessity for Muslims to accept their leadership and guidance for spiritual elevation. The Prophet also said this in the hadith of the thaqalayn: 

"Indeed, I am leaving two things among you, to which if you hold yourself, you will never astray: the book of Allah –who is almighty and great- and my Ahl al-Bayt (household), my 'itra (family). O people hear! And I have announced to you that indeed you will enter my presence and I will ask you about what you did to the thaqalayn (two weighty things) and the thaqalayn are the book of Allah and my Ahl al-Bayt."(3)

Conclusion: 

These narrations illuminate Imam Hussein’s (AS) lofty status in the the Prophet’s (PBUH&HP)eyes and the Prophet’s responses to him serves as a guide. Not only are Muslims, as followers of the Holy Prophet, must praise and love Imam Hussein, but we must also adopt his behavior, thoughts, and ethics, and follow his path in our lives. Furthermore, the Prophet's interactions with Imam Hussein underscore that those who harbor hostility or animosity towards him today are not true Muslims. This group should not be regarded as part  of the Prophet’s (PBUH&HP) religion.

References:

1.  Al‑Irshad (2nd Volume - page 130)
2.  Sunan al-Termizi (6th volume – number 3775)
3.  Al-Kafi (1st Volume – page 452)

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*The Verse of Purification is the 33rd verse of Al-Aḥzāb in the Quran (33:33). The verse has special importance for Shia Muslims due to giving information about Ahl al-Bayt of Prophet Muhammad (PBUH&HP). Shias reportedly believe it to designate the "Ahl al-Bayt" being infallible.

“I have not been sent except to elevate the morality” [1] Morality is such an invaluable asset for humans in this worldly life and the Hereafter that Prophet Muhammad (PBUH&HP) has introduced it as the only goal of his prophetic mission. It is also noticeable in the following verse of the Quran that Prophets were sent by Allah to improve humanity:

“Allah certainly favored the faithful when He raised up among them an apostle from among themselves to recite to them His signs and to purify them and teach them the Book and wisdom, and earlier they had indeed been in manifest error” (3:164)

Moreover, humans naturally seek and look up to role models who have successfully personified all the perfect qualities. One of the shining examples of such models to follow is undoubtedly the last Messenger of God, Muhammad (PBUH&HP) who possesses all the best personality traits:

“and indeed you possess a great character” (68:4)

“There is certainly a good exemplar for you in the Apostle of Allah (i.e., Muhammad (PBUH&HP))” (33:21)

Let’s have a glimpse at some of his most prominent characteristics in this short article:

1. Honesty

Prophet Muhammad’s (PBUH&HP) truthfulness and honesty were so famous among his most noble attributes, from his tender age and before he was chosen as the Messenger of God, that the people of that time would call him al-Amin (the trustworthy).

This characteristic of his reached the extent that almost everyone in Mecca would put their money, valuables, and savings in the hands of Prophet (PBUH&HP) for safekeeping. Even, after he was called for prophethood, despite all their hostility to him, the Quraysh[i] continued depositing their treasure with him.

2. Simple living

In spite of all his responsibilities as a prophet, Muhammad (PBUH&HP) would do all his chores himself as well as helping his family with the household work; he used to patch his clothes, mend his shoes, and milk his goat with his own hands. He would eat simple food, wear simple clothes and travel in a simple manner.

It is not that he could not afford a luxurious lifestyle; there were stages in the prophet’s (PBUH&HP) life when he had a reasonable income from his trading. In fact, he chose to lead a simple life. He preferred to live on what was sufficient and as normally as any other simple Muslim. When he acquired great wealth, he did not hold on to it for himself. Instead, he gave it to the poor and spent it for the good of society.

3. Regularity and Cleanliness

Prophet Muhammad (PBUH&HP) showed great orderliness in all aspects of his life, from his personal matters to all social, political, and economic affairs. He paid attention to his appearance, and was much fond of using perfume and spent so much money on that; he also encouraged his followers to do the same and to keep their bodies and houses clean.

One of the high values taught by the prophet (PBUH) was regarding the importance of time. He urged people to choose the right moment for carrying out specific activities; he would divide his day into three parts, one for saying prayers to God, one for his family, and a portion for himself, which he would share with people. He has mentioned in a narration about self-discipline that “God loves it if any of you does a job, he/she does it perfectly” [2].

4. Kindness

In his social life as well as his family life, prophet Muhammad (PBUH&HP) was always kind, affectionate, and respectful to people. He was known to have a pleasant smile on his face which never faded away. He took the lead to extend greetings to those he knew and those he did not know, including children and slaves.

The holy prophet (PBUH&HP) also showed significant love and tenderness to children; he seated them on his lap, put them on his shoulders, and kissed them. He was incredibly kind to his slaves too. He told people that the slaves were their brothers. He took a great interest in the welfare of all people, had great compassion for people in trouble, and would do his best to remove their sufferings [3].

5. Respect for women

Women in pre-Islamic Arabia would face nothing but neglect from society; all their personal and societal rights were disregarded to the extent that killing and burying female infants alive was a prevalent practice among them. But Islam, from its very beginning, recognized the importance of women and considered the lives of both men and women to be precious.

Prophet Muhammad (PBUH&HP) commanded others to fulfill women's rights and to honor their individuality, and he showed a particular form of respect towards women himself while implementing these principles. An example of his respect towards women is his being helpful to his wives. He has said in this regard: “Beware, the best of you is he who is the best towards his women, and I am the best among all of you toward my women” [4].

Along with these few traits, he possessed so many other significant characteristics that anybody wishes to attain. His life was full of examples of perseverance, modesty, generosity, piety, love, mercy, forbearance, bravery, and many many other ones. Admittedly, that’s why God and His angels bless our Holy Prophet (PBUH&HP):

“Indeed Allah and His angels bless the Prophet; O you who have faith! Invoke blessings on him and invoke Peace upon him in a worthy manner” (33:56)

Notes:
[i] A powerful merchant tribe that controlled Mecca and its Kaaba and that according to Islamic tradition descended from Ishmael. Prophet Muhammad (PBUH) was born into the Banu Hashim clan of the Quraysh tribe.

Reference:

1. Shaykh Ali Namazi, Mustadrak Safinat al-Bihar, volume 1, page 410
2. kanz ul amal: 9128
3. the last prophet
4. prophet Muhammad (PBUH&HP)
5. who is Prophet Muhammad