You won't find solid proof. Intuition tells me otherwise, there's a whole world that runs off intuition/non-judgment/harmony I'm only beginning to experience.
Everything and everyone dies. Not being okay with the idea is common but fruitless. Instead, embrace life while you have it. Live each day to its fullest.
My preferred death would be standing upon a pile of Zombies during the coming Apocalypse, my katana in my hand having already spent my ammunition.