Whoever relies on Allah (has Tawakkul), He is sufficient for him.  (At-Talaaq 65:3)

Tawakkul is an attribute that is a direct result of Iman  and belief in Allah. Through tawakal in Allah, we can believe firmly that:

 

• All my circumstances are a test from Allah to check if I follow a good or bad path.
• The test is about my performance and reaction to those circumstances, how I relate the knowledge of Islam to them and act accordingly.
• How much I devote myself and exhaust my efforts for the promotion of Islam in this life.
• My success or failure depends on the purity of my heart and will to serve Allah in any circumstance.
• The worldy pleasures are not the real success. The real succes is attaining the pleasures from the happiness of Allah.How steadfastly I am continuing my course as a righteous person.

 

The believer feels like a winner when these feelings are residing in the mind. I am truly doing what Allah wants me to do and he is with me all the time. My endeavors will not go invain, he will not fail me and remain unsupported.  In order to be successful in the life of trials, Muslim must have a firm belief:

The Messenger of Allah, Sall Allaahu `alayhi wa sallam said, “How wonderful it is for a believer that he always ends up with goodness: If he suffers and remains steadfast, it is rewarding; if good things happen and he thanks Allah, that is also rewarding.” (Suhaib in the Muslim)

Allah Subhaanahu wa Ta`aala says:

Whoever relies on Allah (has Tawakkul), He is sufficient for him (At-Talaaq 65:3)

Therefore Tawakkul is a natural corollary of true faith for previous people and current Muslim population.

The believers are only those who: when Allah is mentioned, their hearts become fearful; when His verses are recited to them, they increase their faith; and only on their Lord they rely (have Tawakkul). (Galangal 8:2)

When Moos `alayhi invited Bane Israel to enter Palestine , they refused to do so, being scared of the strength of the enemy. Two of the believers endowed with true faith spoke up and said,

Enter upon them through the gate, for when you enter it, you will be the dominant. And rely upon Allah (have Tawakkul), if you are believers. (Al-Ma’idah 5:23)

Also:

But no one believed in Moosa except the offspring (youth) of his people, because of the fear of Fir’awn and his establishment that they would persecute them; and indeed, Fir’awn was arrogant in the land and indeed, he was of the transgressors.

  And Moosa said, “O my people, if you have believed in Allah, then rely on Him (have Tawakkul in Him), if you are Muslims.”    So they said, “Upon Allah do we rely (have Tawakkul). Our Lord! Do not make us (object of) trial (persecution) of the unjust/wrongdoers. And save us by Your mercy from the disbelievers.” (Younus 10:83-85)

 Indeed, there is no authority for him (Shaytaan) over those who believe and rely upon their Lord (have Tawakkul). (An-Nahl 16:99)

Allah ensures that the tawakal of a believer remains firm when the shaitan tries to sow the seeds of doubt and fear inside the mind of a beliver and try to shake his confidence.

The Messenger of Allah, Sall Allaahu `alayhi wa sallam said, “The human mind keeps wandering and branching away into different valleys. If someone follows his mind in all those wanderings, Allah does not care which valley ruins that person. On the other hand, whoever has Tawakkul in Allah, He will be sufficient to save him from those wanderings.” (Ibn Maajah from ‘Amr Ibn Al-’Aas)

A person with no Tawakal will definitely fall into temptation and will not be able to face the adversity without sin.   This means that they have failed the test of Allah and will not be rewarded by the Allah.  Even in basic matters of the world, one has to do his best and then leave the results to Allah Subhaanahu wa Ta`aala.

A person asked, “Should I tie my camel and have Tawakkul (trust in Allah for her protection) or should I leave her untied and have Tawakkul.” The Messenger, Sall Allaahu `alayhi wa sallam replied, “Tie her and then have Tawakkul.” (Reported by Tirmidzi from Anas)

 

Source: missionislam.com/knowledge/tawakkul.htm