When writing lyrics for previous releases, Moore would "start mumbling and I try to figure out what I'm saying and then try to make it make sense". With Blood, he "really wrote them down and tried to make them coherent. I didn't want it to be like 'Oh, you get your own impression of the lyrics. Everybody has their own idea!' I wanted to have an idea that I wanted to communicate, and something communicable." Moore noted that he did occasionally use his "mumbling" method as it "puts you in the right direction as far as sounds, vowel sounds, and stresses on certain syllables. And if you can write some words and lyrics that match that, sometimes it flows really well." He described all the songs as based on "personal experiences". "I'll start writing a song that has a little bit of a world view or political view or something," he said, "but then by the time I'm finished the lyrics it'll be about a relationship or something like that."
