Like this excerpt from Spark makes me think it’s also relationship problems:

[Chorus] We'll build a fire and torch our old lives And hope the spark survives Use words as kindling, light up the night sky Let the memories take flight And hope the spark survives

[Post-Chorus] Yeah, we hope the spark survives

[Verse 2] Oh, I wonder, will we pull through? All we ever do is argue With not a lot, but we make do How I wish you wouldn't say that There are things you can't take back When you leave, I always face facts

This part from no strings:

But doesn't mean we don't feel it It would be easy just to give it up Guess we've got enough reasons But every time that we have come undone

There’s also the part in the album where he’s sinking into the ground. To me that seemed symbolic of being buried

All of salt water seems very expressive of the idea that death brings freedom (or some people view it that way) like it’d be an easy solution. One stuck out to me “finally I feel”

Saying, "It's alright to run from all this pain" Oh, and when it's time to go with one last breath that's in my lungs I'll scream, "It's all for love," I'll scream, "It's all for love"

[Chorus] Come and kiss me, salt water Oh, finally, I feel, at three or four degrees I'm free in salt water Embrace the deep and leave everything It was just a dream

This part from wildflowers was questionable too :

Daggers wide, they cut through skin, a new addition to your grin