After 'shirk' no sin could be greater than to despair of Allah's mercy and benevolence. This attitude reduces a person to a state of utter hopelessness. He imagines himself to be destined for Hell, and therefore he sees no benefit in doing good and avoiding evil. Consequently he tries to achieve as much worldly pleasure as possible and thus gets further involved in all kinds of sinful acts. Any other type of sinner could be pardoned if he repents. But the one who despairs does not deserve to be pardoned because the mental condition of such a person does not lead him towards repentance, but instead, induces him to continue to commit further acts of transgression against Allah's commands.
Hence it means that despair is the greatest of the sins. It is appropriate therefore that all the different varieties of despair may be explained and also their cures, so that the believers can keep themselves away from them.
The Almighty Allah has created a cause of all the phenomena of this world by His unlimited power and absolute strength. For example, in the physical affairs food is needed for satiation of hunger, water for quenching thirst, doctor and medicine for curing diseases and work for removing poverty.
In the same way the spiritual phenomena also depend upon various causes. The salvation of a sinner depends upon his repentance, the achievement of absolute belief needs the guidance of an infallible guide (Imam), and the attainment of grades in piety and the high stages of the hereafter depend upon the purity of intention in the deeds performed. The aim of creating man was to make him think and recognise Allah in the proper way. But the thorough recognition or belief is not possible till man realises that the Creator of causes as well as effects is Allah. The causes by themselves cannot bring out an effect till the One who has created these causes gives the capability to the cause to bring out such effect. Therefore one should not be pleased at the apparent causes or be aggrieved due to their absence.
Cause is Not Independent
When causes that would fulfill needs or desires appear, man becomes happy and he believes in the Might of Allah. But when these causes fail to have any effect he becomes sorrowful. In order to avoid such a situation Allah has laid down a procedure. Firstly he renders the causes ineffective so that the believer may not consider these to be originally having the effective properties. On the other hand he creates the factors which were hereto non-existent, so that the believing people may not fall into despair. A few examples are mentioned to explain this fact.
First Example
Fire Did Not Burn - Knife Did Not Cut
The fire ignited by the order of Namrood to burn Ibrahim (a.s.) was made bereft of its burning property, by Allah. It is said, that the fire was so intense that birds flying at a height of three miles used to be scorched by the heat and drop dead.
So they threw Hazrat Ibrahim (a.s.) into the fire with the help of a catapult from far away. In the Holy Quran Allah says:
"We said: O fire! be coolness and peace to Ibrahim."
(Surah Anbiya 21:69)
The fire immediately lost its essential property of burning, and cooled down; and if Allah had not ordered it to be peaceful (safe) for Ibrahim (a.s.) it would have become colder and may have frozen Ibrahim (a.s.) to death.
In the same way when Ibrahim (a.s.) proceeded to slaughter his son Ismail (a.s.) the knife was blunted by Allah's command. Ibrahim (a.s.) threw the knife away and a voice emerged from it. "The Khalil (friend) of Allah commands me to cut and the Lord of the Khalil restrains me from it."
Second Example
Musa (a.s.) and Firon
History records that the tyrant rulers have always oppressed Allah's representative on earth, the Prophets and the Imams. These rulers have made relentless use of all the might and power at their command to pursue the Prophets and terminate their lives. But the Almighty Allah used to render their efforts null and void. The life of Musa (a.s.) during the reign of Firon is full of such instances from the beginning to end.
A powerful king like Firon wanted to kill Hazrat Musa (a.s.) while he was still in his mother's womb, but he did not succeed and Musa (a.s.) was born. Firon continued in his efforts to murder him but all his plans were foiled by Allah. Physical and spiritual causes are of no significance in comparison to the Divine decree. Thus Musa (a.s.) was not only born safely but grew up in Firon's own palace and in his own lap.
"And Firon's wife said: A refreshment of the eye to me and to you; do not slay him; maybe he will be useful to us, or we may take him for a son; and they did not perceive."
(Surah Qasas 28:9)
Third Example
The Attack of Abraha on the Ka'ba
In the year of the birth of Holy Prophet (s.a.w.s.) the army of Najjashi came to attack the Holy Ka'ba. It was led by the commander Abraha. The army consisted of elephants and possessed all the armaments of war. Abraha, proud of his bulky army and weapons was confident of success. But the creator of all causes weakened their efforts. When Allah willed all the human and animals in the army came to a standstill. However much they tried, the elephants refused to move towards the sacred house.
On the other hand 'Ababeel' appeared on the horizon. Each of these birds carried three pebbles; one in the beak and one each in their claws. They surrounded the complete army and began to pelt them with pebbles. Each pebble fell on the head of the soldiers and pierced through their body to reach the ground and sank into it. Consequently the entire army perished, except one soldier. This soldier retreated to king Najjashi and related the episode in detail. This incident gained so much importance that the year began to be referred to as 'Aamul Feel', or the year of the Elephant. Thus the history of Arabs record the birth of the Holy Prophet (s.a.w.s.) to be in the year 1st Aamul Feel and the year of his Be'sat (declaration of Prophethood) to be 40th Aamul Feel.
Fourth Example
The Holy Prophet (s.a.w.s.) and How His Life was Saved
The protection of the Holy Prophet (s.a.w.s.) from the blood thirsty people of Makkah and later his being shielded from death in the various battles is considered to be a sign of Allah. All the polytheists had united to martyr the Holy Prophet (s.a.w.s.) right from the day he declared his Prophethood. They had all the means to achieve their purpose but as a Persian couplet says: "Who can extinguish the lamp lighted by Allah."
Fifth Example
He Creates Without an Apparent Cause
Even if the apparent causes, both material and non-material ones, are absent, Allah creates them by His unsurpassed power. There are numerous examples of such a phenomenon. The foremost example is that of the father of man, Hazrat Adam (a.s.) whom Allah created without the union of a male and a female. Adam (a.s.) came into existence from non-existence. Similarly Prophet Isa (a.s.) was born to the chaste maid, Janabe Maryam (a.s.) even though a man had not touched her.
Hazrat Yahya (a.s.) was born to Hazrat Zakaria (a.s.) when he had reached an extremely old age and when his wife had lost all hopes of conceiving. Hazrat Ishaq (a.s.) was born to Hazrat Ibrahim (a.s.) when Hazrat Ibrahim was aged and inspite of his wife Janabe Sarah being barren previously.
source : GREATER SINS/ by Al-Haaj Sayed Abdul Husain Dastghaib