Just listen to it...
It's beautiful.

It brings so many images to my mind...

One imagine is just like being in outer space, just floating in the air, surrounded by stars.

Another image is just everyone in Undertale together on the surface, just spending time together and being happy and comforting each other who might be sad.

And yet another image is just being in a simple void with only panels of memories to look at, similar to the part with Celestia singing to Twilight in the MLP Magical Mystery Cure episode.

I just love this soundtrack...
Shame it's exclusive to PS4.

I could listen to this for hours...I could probably even fall asleep to this.

It's so peaceful and beautiful...