Bismillah is the most important sentence in the holy Quran because Muslims are encouraged to say it frequently in their daily lives and before any action. The word Bismillah includes the Mercy and favors of Allah that has bestowed upon his creations. So every action that we do includes mercy and love. When we say Bismillah, mercy and love pours into our hearts, and our limps will act with mercy in return. Indeed, our actions will become the mirror of the heart.
Ali (ra) describes how reciting Bismillah polishes the heart and affects our actions in this beautiful saying:
Bismillah ir-Rahman ir-Rahim is an effective du’a for simplifying a difficult task; and removes all grief and brings happiness in the heart.
When we mention Allah before our actions, we submit our will to the divine will. Therefore, all our actions will be what Allah wishes for us and it removes our ego out-of-the-way. Our actions will also include all of Allah’s 99 divine names and attributes. When we remove our ego which has multiple layers of limitations and imperfections and submit ourselves to the divine, miracles begin to happen. Fears impeded in our minds no longer convince us that many things can go wrong. Allah says in the holy Quran, if he wishes something it will happen. Adopt this power through submission and having the belief that with Allah, all things are possible. With Allah, our actions are creative, merciful, divine, and filled with love.
Prophet Muhammad (Pbuh) said : Any important work that does not begin with Bismillah is imperfect or devoid of Barakah”كل أمر ذي بال لم يبدأ ببسم الله فهو أبتر (Sunnan Abu Dawud)
This explains the point that if we perform our tasks while relying on our limited self that is imperfect , our tasks will be imperfect, but if we rely on Allah who is only perfection then our tasks will be perfect.
The following are further hadiths on the importance of reciting Bismillah before the beginning of every action:
1) Before Ablution ( Wudu): for Imam Ahmad and the Sunan compilers recorded that Abu Hurayrah, Sa`id bin Zayd and Abu Sa`id narrated from the Prophet ,
«لَا وُضُوءَ لِمَنْ لَمْ يَذْكُرِ اسْمَ اللهِ عَلَيْهِ»
(There is no valid ablution for he who did not mention Allah’s Name in it.)
2) Before Eating: or Muslim recorded in his Sahih that the Messenger of Allah said to `Umar bin Abi Salamah while he was a child under his care,
«قُلْ بِسْمِ اللهِ وَكُلْ بِيَمِينِكَ وَكُلْ مِمَّا يَلِيكَ» (Say Bismillah, eat with your right hand and eat from whatever is next to you.)
Some scholars said that it is obligatory for a Muslim to say Bismillah before eating.
3) Before Sexual Intercourse: The Two Sahihs recorded that Ibn `Abbas said that the Messenger of Allah said,
«لَوْ أَنَّ أَحَدَكُمْ إِذَا أَرَادَ أَنْ يَأْتِيَ أَهْلَهُ قَالَ: بِسْمِ اللهِ اللَهُمَّ جَنِّبْنَا الشَّيْطَانَ وَجَنِّبِ الشَّيْطَانَ مَا رَزَقْتَنَا،فَإنَّهُ إِنْ يُقَدَّرْ بَيْنَهُمَا وَلَدٌ لَمْ يَضُرَّهُ الشَّيْطَانُ أَبَدًا»
(If anyone of you before having sexual relations with his wife says, ‘In the Name of Allah. O Allah! Protect us from Satan and protect what you grant us (meaning the coming offspring) from Satan,’ and if it is destined that they should have a child then, Satan will never be able to harm that child.)