Castiel knelt down, physically stopping Ben from getting any further. It had been hard, keeping his emotions in check for the last several hours, preventing himself from giving into the rage and grief he wanted to just surrender to. Seeing Ben like this, with that level of emotion, was just painful for the angel.
"Just stop, Ben, please," he pleaded with him, his voice cracking slightly for the first time that evening.
"I know how you feel, I promise. But this, killing her, it won't help Sam, you need to trust me on that."