[ it's a bone deep understanding. castiel's abandoned everything he knows, everything he was built for, heavenly paradise, to remain glued to dean's side. a dead devotion to holding his post as guardian and friend. the simple fact he's away now, made himself something to worry about rather than a stable force to lean on, will eat at him for months, maybe years, maybe more. so yes, he gets it, when jo states in no uncertain terms that neither heaven nor hell can drag her from his side. he gets it.

he knows she must be hurting, and of course he'd prefer she kept herself safe and away. but he can't berate her from taking the same stance he would in her place. there's only understanding and respect for her choice. ]

Í̶̱̱̓̚'̴̟̟͑m̷̧̩͋̏̀ ̷̌̈͜g̴̺̀l̵͑͜ạ̷̖̾̊ḑ̴̄͝ ̶͇̌ͅ he's in good hands.
I̷̯̠̰͝f̵͕͊ ̷̩̥͔̌̇̉ȧ̶̞̻n̷͇̯̐̅̌y̵̧̐ͅö̵̝͇̰́n̶̯͂ȅ̵̹͇ ̸̝͖́c̴̮̹̏a̷͇̺̙͆̓̀n̷̹͐͑͊ find calm in him, I'm certain it would be you and Sam