The album expands on the aggressive sound of the band's previous work with refined musical details and occasionally slower songs. In
The Rough Guide to Rock (2003), music journalist Alex Ogg writes that The Afghan Whigs were "managing to balance volume with subtlety" amid the burgeoning
grunge music scene. The album's music incorporates heavy
counterpoint rhythms,
indie rock harmonics,
wah-wah and
slide guitars,
Chicago Tribune writer Brad Webber compares its melodies to those of "later
Hüsker Dü". The album's rock sound is complemented by a predominant soul influence. According to
The Vinyl District writer Joseph Neff, on
Congregation, the Afghan Whigs expand on contemporary
alternative and indie rock with an integrated dimension of
R&B, soul, and funk.
Magic magazine's Christophe Basterra characterizes the resulting music as "
The Four Tops appropriating '
Search and Destroy' by
Iggy & the Stooges". Dulli wrote the song in an attempt to deviate from the aesthetic of Sub Pop, who he felt discouraged its acts from recording slow songs. He cites writing the song as the moment he began having faith in himself as a songwriter. "Conjure Me", and "Turn On the Water" incorporate funk influences and wah-wah guitar. "Tonight" features bluesy acoustic guitar. In
Stereogum writer Peter Helman's analysis,
Congregation debuts the predominance of Dulli's "leviathan libido" over an album-length work, avoiding the multi-layer metaphors of
classic rock-inspired contemporaries such as
Eddie Vedder and instead expressing emotions in an R&B style: "Artists like the
Supremes, the
Temptations, and even the Four Tops often wrote songs that seethed with domestic drama and pent-up sexual energy." Dulli's
baritone vocals throughout the album are moaningly husky and feature
falsetto wails. David Sprague of the
Trouser Press calls
Congregation a "strangely flamboyant" album that showcases "Dulli's metamorphosis from everypunk wallflower to rakish scoundrel with a
heart of glass." "I'm Her Slave" is a
heroin anecdote with lyrics narrated by a subjugate lover. Inspired by a paranoid breakup, "This Is My Confession" has a theme of
absolution, "Let Me Lie to You" has lyrics expressing passive cruelty and subtle manipulation. == Marketing ==