By the time we get to “I Built You A Tower (b)”, he’s exhausted. The line “I’m learning how to live without you” sums up everything that I Built You A Tower is supposed to be: a meditation on denial, anger, bargaining, depression, and acceptance. Grief can take the energy out of anyone; I Built You A Tower is Death Cab For Cutie processing grief and watching it sap the life out of Gibbard in full-on stereophonic sound.