I'm sorry, but I'm just curious on why we say Bismillah al Rahman al Raheem in the beginning of the surahs we read and not let's say for example Bismillah al Azeem? I'm sorry I don't mean it to be disrespectful in any way possible but I'm just curious.
Let's start with an explanation of the meaning of the Basmalah (Bismillah ar-Rahman ar-Raheem)
بِسْمِ ٱللَّهِ ٱلرَّحْمَٰنِ ٱلرَّحِيمِ
actually means in English something like:
In the name of Allah, the Entirely Merciful, the Especially Merciful. (see for example 1:1 https://quranx.com/1.1)
It is a sentence which is used to praise Allah and we are recommended to recite when starting the qur'an recitation and it is a well discussed matter among scholars whether or not it is part of the beginning of 113 out of 114 surahs in the qur'an. This sentence actually contain two of the names of Allah (beside the name "Allah" itself) ٱلرَّحْمَٰن "the Entirely Merciful" and ٱلرَّحِيم "the Especially Merciful".
Note that praising Allah by starting with or in his name, was known before Islam as the qur'an quotes it in the speech of two former prophets:
And [Noah] said, "Embark therein; in the name of Allah is its course and its anchorage. Indeed, my Lord is Forgiving and Merciful." (11:41 https://quranx.com/11.41)
Indeed, it is from Solomon, and indeed, it reads: 'In the name of Allah, the Entirely Merciful, the Especially Merciful, (27:30 https://quranx.com/27.30)