okay so being alone and finding yourself, landing on the other side or coming to terms with a part of yourself you once feared. coming to this realization is both isolating (alone, lost) but also feels like finding yourself for the first time in a long long time, you're "alive" again.
dreaming of the drop of guillotine blade - intense shame/fear of his who he is or some part of who he is and his "execution" because of it
now because he's come to terms with who he is/the part of himself he no longer wants to hide the nightmares go away (literal or metaphorical) and likely he also no longer has the intense shame attached... no longer feels like he deserves punishment for who he is.
that's... hm. interesting. flight used as freedom or getting away in some other lyrics but jay also heavilyyyy relies on the ocean/waves/sailing as a mental journey too. in this it's more of an i don't want to run (fly) away from who i am, even though flight is an intrinsic part of who i am and how i've always been able to find myself through running away or constantly distracting myself with a new adventure (this is a bit of an embellishment of the interpretation of the lyrics on my end for sure maybe) but this time i know that to fly would be to hide myself and i don't want to do that anymore? okay.