The soul&"s contentment is attained only through belief in Allah(mighty and majestic is He). An unbelieving soul remains insecure, scared, lost and weak, with no stability. The only belief that leads to deliverance is the belief in Allah. It means the firm ratification that Allah is the Lord of everything, the King and Creator of everything, and He alone is worthy to be singled out for worship in Salah (prayers), Sawm (fasting), Du&"aa (supplication), when having hope and fear, and being humble and submissive. He (mighty and majestic is He) alone has all the perfect attributes, being exalted from any deficiency or defect.Iman in Allah is the light that guides to justice, freedom and knowledge. It is the light that guides to the straight path; the light that leads us to spiritual tranquility and security.
Belief in Allah includes belief in His angels, scriptures, messengers, the Last Day and fate, whether good or evil. This belief is the origin of human happiness. It is the Jannah of the believer in this world and leads him, Allah Willing, to the Jannah of the Hereafter.
Iman from the religious point of view means: “Believing with the heart and at the same time expressing that belief with the tongue&"
If this is realized, then it should be known that the bases upon which Allah accepts our deeds is Iman. Allah (mighty and majestic is He) says: &"So whoever does righteous deeds while he is a believer&" (Al-Anbiyâ&": 94).
The best and most pure of all deeds in the sight of Allah is Iman. Abu Tharr (may Allah be pleased with him) narrated that he asked the Prophet (peace be upon him): &"O Messenger of Allah, which deed is the best?&" He replied, &"Having Iman in Allah and fighting in His cause (Jihad)&" (Narrated by Muslim).
Iman is the path that leads to guidance and happiness in this world and the Hereafter. Allah Almighty says: &"So whoever Allah wants to guide - He expands his breast to [contain] Islam&" (Al-An&"âm: 125).
Iman leads the Mu&"min (believer) away from sinning. Allah Almighty says: &"Indeed, those who fear Allah - when an impulse touches them from Satan, they remember [Him] and at once they have insight&" (Al-A&"râf: 201).
Iman is a condition for any deed to be accepted by Allah. Allah says: &"And it was already revealed to you and to those before you that if you should associate [anything] with Allah, your work would surely become worthless and you would surely be among the losers&" (Az-Zumar: 65).
Sincere Iman makes the deed blessed and makes Du&"aa (supplications) be accepted by Allah.