Why does the Torah begin with the Hebrew letter "B" instead of with "A"?
The Talmud Yerushalmi (Chagigah 2:1) says that the Torah begins with a "B" instead of an "A" because the word "baruch" ("blessed") begins with "B", whereas the word "arur" ("cursed") begins with "A", and a blessed world had a better chance of surviving. Of course, many "good" words begin with "A", and many "bad" words with "B"; there is no general principle stating that "B" should always be used in preference to "A".
In further amplification: The Torah begins with two "B" words (Bereishis bara); G-d’s Name (Elo-him, beginning with an Alef) is the third word. When the Torah was translated into Greek at the request of King Ptolemy, the translators deliberately changed the word order so that G-d’s Name would come first. The commentary Torah Temimah quotes the passage from the Talmud Yerushalmi and says that this passage is actually asking why G-d’s name didn’t come first. Of course, the scientific answer is that the word order of Biblical Hebrew calls for the verb to come before the noun; but the Talmud preferred to give a Midrashic answer: That it was better to start with "B" because it is the first letter of "blessed".