Vala, or The Four Zoas the histories of the Druids and of the Christians along with adding various locations connected to them. In both editions of the poem, Blake changed his mythological system in the "Book of Urizen" from a dualistic struggle between two divine powers to a struggle of four aspects split from Eternity. These aspects are Blake's Four Zoas, which represent four aspects of the Almighty God and "Vala" is the first work to mention them. In particular, Blake's God/Man union is broken down into the bodily components of Urizen (head), Urthona (loins), Luvah (heart), and Tharmas (unity of the body) with paired
Four-letter word category includes words that are euphemistic evasions of "stronger" words, as well as those that happen to be short and have both an expletive sound to some listeners as well as a sexual or excretory meaning (many also have other, non-vulgar meanings): "" (US), "", "", "" (US), "" (UK, NZ, AUS), "" and "", as several examples. Finally, certain four-lettered terms with limited usage can be considered offensive by some, within the regional dialect in which they are used, such as "" and "mary". Occasionally the phrase "four-letter word" is humorously used to describe common words composed of four