slower parts recalled the work of Cult of Luna and Isis. It abandoned the pop choruses of the They're Only Chasing Safety and instead demonstrated a heavier and more eclectic range of styles. The band themselves said that the heavier style was "nothing super intentional, they [the songs] just came out that way when we went to write". Tony Cummings of Cross Rhythms described the album as "an impressively versatile project where metal riffs and emo breakdowns, screamo noise and memorable hooks collide in a veritable sonic feast," and AllMusic described the band as finding the centre point between "throat-shredding grindcore and My Chemical Romance/From Autumn to Ashes-style emo-punk". Chamberlain explained that he switched from a higher pitched scream to a lower pitched one as it felt more natural for him. Define the Great Line was noted as a turning point for Underoath, with AllMusic commenting that "while the tendency to dissolve into the abyss of angtsy emo-pop was still there," there was a "darkness lurking in the nooks and crannies between the crackling snare hits and heavy 'drop-d' riffing" that would be fully realized on their sixth studio album Lost in the Sound of Separation (2008). Alternative Press mentioned that the band had updated its "early, brutal style with weird time changes and post-metal ambience". Andree Farias of The Fish said the album" not only redefines the sound of Underoath, but also has the potential of redefining the hardcore emo genre". Brandon J. said the guitarwork was "merciless and somewhat chaotic, and the vocals range from the usual middle to high screams all the way to a deep and very powerful growl". Title and lyrical themes The title of the album, according to keyboardist Christopher Dudley, comes from "defining that line for yourself between becoming the man or the woman that you want to be and the man or the woman other people want you to be". Aaron Burgess of Alternative Press used the title as an example of how on this album Underoath seemed "acutely aware of the line that separates their spiritual core from the painful reality of being human," and how "even successful musicians need help staying on the right side of that line". For its lyrics, the band maintained its focus on Christianity and personal struggles, and according to Josh Taylor of Jesus Freak Hideout the big difference was "the frequency at which God is