Sans: I bought you a gift: 

it's a picture frame for my face when you decide to place me in the past 

(because nothing lasts). 

Flowey: I won't talk or move;

 I'll fit well upon a bookshelf, and when I look at myself, I'll disappear. 

There's nothing there to see me. 

Sans/Flowey/Chara: Yeah, yeah, yeah, I knew it all along, I knew it from the very start.

 I felt it in my heart if there's even one to feel. (x2)

 Alphys: I sing into a machine, and you hear me over a speaker. 

That's how we were in her room, a distant sun. 

She's taking off her clothes. 

I hear echoes of your breathing.

I am cheating on myself. 

Oh what a path to guide me!

San/Chara/Flowey: Yeah, yeah, yeah, I knew it all along, I knew it from the very start.

I felt it in my heart if there's even one to feel. (x2)

 Asgore/Sans: And you're always on my mind, but I never mind the space that you take up in my veins. 

Oh I'll take you any way I can, because day by day we'll fade away. 

Sans/Chara/Flowey: Yeah, yeah, yeah, I knew it all along, I knew it from the very start.

I felt it in my heart if there's even one to feel, oh.