Only humans can feel real joy. But... also such profound pain. 
This is easier. 
10x03 "Soul Survivor"

"Welcome back, Dean!"

Or… not? I finally managed to re-watch the episode and this scene sort of struck me all over again, because even on first watch I couldn’t shake the feeling that when Sam and Cas were relieved to see that blackness dissolving in Dean’s eyes, I felt like this is not a 100 percent Dean here.

And maybe it’s just me seeing things or Jensen did it on purpose - either way the emotions that play over Dean’s face here within seconds and how Jensen delivers them is truly amazing. I mean, it goes from surprise and confusion to sadness and realization to shame and guilt and then - at least I feel - back to something more sinister and layered and twisted. While in gif 3 and 4 we seem to be dealing with a purely human Dean judged from his entire expression, gif 6 and 7 - at least to me tell or open up the possibility for a different story. The way he looks up, the jaw clench (which Dean does a lot and which could be indicative of Human!Dean), the expression in his eyes…

Somehow to me it feels like we are just moments away of his lips twisting into a smile before saying: “Awwww, you really thought it worked, didn’t you! Sorry, pals - old Dean is gone.”

I know it’s unlikely, but to me the way Jensen played this there is room for the possibility of Dean pretending - aside from the spraying with holy water, which had no effect on him any longer and of course pushes the notion of everything being back to normal - and messing with them. It’s probably not the case, but still…

Maybe it’s just me though, but the whole curing process was just way too fast and way too easy to actually be working in the long run. So maybe this small moment could allude to the dark side that still lives within Dean and that will come bubbling back to the surface (around midseason?) and will be far more deadly and far harder to get back under control than this time around…

Quranic Dua from 2:286

رَبَّنَا وَلَا تُحَمِّلْنَا مَا لَا طَاقَةَ لَنَا بِهِ

Our Lord, and do not burden us with that which have no ability to bear. (Quran 2:286)

Originally found on: nawal-saad