The full name for this song is "Slumber/Dreamscape/Hero'
s Resolve". The first little bit is a slumber of sorts, the falling/drifting into the dreamscape. The middle portion is within the dream and the discoveries, adventures, and exploration that it entails. The last bit is a more valiant sounding portion; in this dream the person has chosen to be a hero and they are given a hero's resolve as a result.