Morris and Saxe penned "Line by Line" with help from Morris' "The Bones
" co-writer Jimmy Robbins. Saxe told Apple Music's Zane Lowe the song was inspired by a conversation with Morris where they were swapping stories about trying to bottle up feelings in three-minute love songs. "I get to know myself in them, and I think Maren feels similarly." he explained. "The day we wrote 'Line by Line,' we were talking about how sometimes the best feelings are the hardest ones to describe, and how the love we have for our partners seems bigger than what can fit in a song."
"Often, a song can be a really intimate place to fully represent how big love can be," Saxe added. "And I think this song is us making our best attempt."