The bet is God's title to His book
From Sensus Plenior
The bet ב is God's title to His book
As the first visible letter to the Tanakh, the bet is the title to God's book. It's metaphor is a resh with a horizontal line at it's base. The resh means 'a revelation' and the base is man. The Bet is 'A Revelation to man'.
The bet is also a prefix to the word 'reshit' or 'the beginning'. It is translated 'in' such that b'rashit means 'in the beginning'. If the bet is used as a prefix in 'bar' or 'son', then "The Son is in ב the revelation ר".
