Everything that could be done has been done. All that should be said has been said, or else will be forever unsaid save in regret.
Time stands still.
The purposeful, goal - oriented drive to do something to make things better crashes into the reality of the moment. Then, in that moment, one learns of helplessness. And in that moment, one's heart aches in a way which is new. One looks helplessly around, and miserably stands by and watches while an end draws inexorably nearer. And then one looks up, and sees a person at the door, and immediately knows that this person has come with the gift of presence.