The Islamic definition of Iman/Faith is believing in something with the presence of proof. Unlic the Christian definition which is based on absence of proof.

Narrated Ibn ‘Umar:

Allah’s Messenger (ﷺ) said: Islam is based on (the following) five (principles):

1. To testify that none has the right to be worshipped but Allah and Muhammad is Allah’s Messenger (ﷺ).

2. To offer the (compulsory congregational) prayers dutifully and perfectly.

3. To pay Zakat (i.e. obligatory charity) .

4. To perform Hajj. (i.e. Pilgrimage to Mecca)

5. To observe fast during the month of Ramadan.

Sahih Al bukhari

regarding the deeds of faith

Narrated Abu Huraira:

The Prophet (ﷺ) said, “Faith (Belief) consists of more than sixty branches (i.e. parts). And Haya (This term “Haya” covers a large number of concepts which are to be taken together; amongst them are self respect, modesty, bashfulness, and scruple, etc.) is a part of faith.” (Sahih Al Bukhari)

 A Muslim is the one who avoids harming Muslims with his tongue and hands

Narrated ‘Abdullah bin ‘Amr:

The Prophet (ﷺ) said, “A Muslim is the one who avoids harming Muslims with his tongue and hands. And a Muhajir (emigrant) is the one who gives up (abandons) all what Allah has forbidden.” (Sahih Al Bukhari)

Whose Islam is the best (Who is the best Muslim)?

Narrated Abu Musa:

Some people asked Allah’s Messenger (ﷺ), “Whose Islam is the best? i.e. (Who is a very good Muslim)?” He replied, “One who avoids harming the Muslims with his tongue and hands.”

To feed others is part of Islam

Narrated ‘Abdullah bin ‘Amr:

A man asked the Prophet (ﷺ) , “What sort of deeds or (what qualities of) Islam are good?” The Prophet (ﷺ) replied, ‘To feed (the poor) and greet those whom you know and those whom you do not Know (See Hadith No. 27) ( Sahih Al Bukhari)

To love the messenger is part of faith

Narrated Abu Huraira:

“Allah’s Messenger (ﷺ) said, “By Him in Whose Hands my life is, none of you will have faith till he loves me more than his father and his children.” (Sahih Al Bukhari)

Sweetness (delight) of faith

Narrated Anas:

The Prophet (ﷺ) said, “Whoever possesses the following three qualities will have the sweetness (delight) of faith:

1. The one to whom Allah and His Apostle becomes dearer than anything else.

2. Who loves a person and he loves him only for Allah’s sake.

3. Who hates to revert to Atheism (disbelief) as he hates to be thrown into the fire.”

 To flee (run away) from Al-Fitn (afflictions and trials), is a part of religion

Narrated Abu Said Al-Khudri:

Allah’s Messenger (ﷺ) said, “A time will soon come when the best property of a Muslim will be sheep which he will take on the top of mountains and the places of rainfall (valleys) so as to flee with his religion from afflictions.”

The grades in superiority of the believers will be according to their good deeds

Narrated Abu Said Al-Khudri:

The Prophet (ﷺ) said, “When the people of Paradise will enter Paradise and the people of Hell will go to Hell, Allah will order those who have had faith equal to the weight of a grain of mustard seed to be taken out from Hell. So they will be taken out but (by then) they will be blackened (charred). Then they will be put in the river of Haya’ (rain) or Hayat (life) (the Narrator is in doubt as to which is the right term), and they will revive like a grain that grows near the bank of a flood channel. Don’t you see that it comes out yellow and twisted” (Sahih Al Bukhari)