[Spock regarded her curiously for a moment.
Though there were many emotions still unknown to him in their workings... But this? He felt as though he could almost grasp it.]

It is not a weakness to admit that you do not know... However, I have come to believe that it is not what others can do to help you, rather what you can do to help yourself.
Is it possible that you refuse to move on because you believe that to do so would discredit your late husband?