▁Mc Lu han ▁when ▁the ▁two ▁had ▁l unch ▁in ▁New ▁York ▁City , ▁adding , ▁" Mar sh all ▁was ▁very ▁much ▁interested ▁in ▁ideas ▁and ▁market ing , ▁and ▁he ▁started ▁singing ▁something ▁like , ▁' P s ych ed el ics ▁hit ▁the ▁spot ▁/ ▁Five ▁hundred ▁micro gram s , ▁that ' s ▁a ▁lot ,' ▁to ▁the ▁t une ▁of ▁[ the ▁well - known ▁Pe psi ▁ 1 9 5 0 s ▁singing ▁commercial ]. ▁Then ▁he ▁started ▁going , ▁' T une ▁in , ▁turn ▁on , ▁and ▁drop ▁out .' " ▁Though ▁the ▁more ▁popular ▁" turn ▁on , ▁t une ▁in , ▁drop ▁out " ▁became ▁syn onymous ▁with ▁Le ary , ▁his ▁actual ▁definition ▁with ▁the ▁League ▁for ▁Spirit ual ▁Disc overy ▁was : ▁" Drop ▁Out ▁– ▁det ach ▁yourself ▁from ▁the ▁external ▁social ▁drama ▁which ▁is ▁as ▁de h yd r ated ▁and ▁ers atz ▁as ▁TV . ▁Turn ▁On ▁– ▁find ▁a ▁sacr ament ▁which ▁returns ▁you ▁to ▁the ▁temple ▁of ▁God , ▁your ▁own ▁body . ▁Go ▁out ▁of ▁your ▁mind . ▁Get ▁high . ▁T une ▁In ▁– ▁be ▁re born . ▁Drop ▁back ▁in ▁to ▁express ▁it . ▁Start ▁a ▁new ▁sequence ▁of ▁behavior ▁that ▁reflect s ▁your ▁vision ." ▁ ▁Re pe ated ▁F BI ▁ra ids ▁ended ▁the ▁Mill bro ok ▁era . ▁Le ary ▁told ▁author ▁and ▁P rank ster ▁Paul ▁Kr ass ner ▁regarding ▁a ▁ 1 9 6 6 ▁ra id ▁by