▁such ▁as ▁Arch ers ▁of ▁Lo af ▁and ▁Din osa ur ▁Jr . ▁ ▁L yr ics ▁ ▁Most ▁of ▁Mot ion ▁City ▁Sound track ' s ▁lyr ical ▁content ▁was ▁written ▁by ▁lead ▁vocal ist , ▁Justin ▁Pierre . ▁This ▁material ▁was ▁largely ▁affected ▁by ▁his ▁personal ▁life ▁and ▁past ▁experiences . ▁Songs ▁came ▁about ▁in ▁a ▁my ri ad ▁of ▁ways . ▁Many ▁times , ▁the ▁band ▁would ▁write ▁music ▁first ▁that ▁Pierre ▁would ▁set ▁words ▁to , ▁other ▁times ▁Pierre ▁would ▁write ▁a ▁song ▁on ▁guitar ▁with ▁words ▁and ▁bring ▁it ▁to ▁the ▁band . ▁Pierre ▁could ▁often ▁" sp end ▁hours ▁and ▁days ▁and ▁weeks ▁and ▁months ▁on ▁lyr ics — s ometimes ▁they ▁come ▁quick , ▁sometimes ▁they ▁don ' t ▁come ▁at ▁all ," ▁he ▁said . ▁He ▁noted ▁that ▁he ▁had ▁a ▁screen writing ▁teacher ▁in ▁film ▁school ▁that ▁taught ▁him ▁to ▁" write ▁what ▁you ▁know ," ▁but ▁in ▁his ▁case , ▁he ▁could ▁only ▁write ▁about ▁" be ing ▁a ▁self - obs essed ▁p ess im istic ▁sort ▁of ▁los er ." ▁This ▁led ▁him ▁to ▁character ize ▁his ▁writing ▁as ▁a ▁sort ▁of ▁ther apy ▁for ▁him ▁and ▁a ▁vehicle ▁to ▁better ▁understand ▁the ▁human ▁condition . ▁ ▁Comm it ▁This ▁to ▁Memory ▁" address es ▁the ▁them es ▁of ▁subst ance ▁ab use , ▁psych ological ▁dis orders ▁and ▁failing ▁relationships ." ▁For ▁the ▁record , ▁he ▁intended ▁to ▁simplify ▁his ▁lyr ics ▁to ▁enh ance ▁story t elling ▁and ▁he